Prostho rudman Flashcards
1
Q
in comparing clasp arms of the same diameter, contour and legnth , the STIFFEST would be made of? a. cobalt-chromium b. type II gold alloy c type III gold alloy d. type IV gold alloy e. none of the above
A
a
2
Q
in planning fixed prosthesis, traumatic occlusion in the existing dentition should beeliminated
a. before construction of fixed restoration
b. after all fixed restorations are cemented
c. just prior to cementations of fixed restoration
d. at no time, unless the patient comlains of pin which can be related to traumatic occlusion
e. none of the above
A
a
3
Q
the setting rate of an irreversiblehydrocolloid maybe slowed by safely and effectively by
a. increasing the spatulation time
b. decreasing the raio of water to powder
c. decreasing the temperature of the mixing wter
d. using 2 % solution of potassium sulfate instead of water for preparing thte mix
e. none of the above
A
c
4
Q
the BEST impression technique for recording loose maxillary anterior hyperplastic tissues is an edentulous patient involves
a. registering the tissue in its passive position wih minimum distortion
b. using high -fusing modelling compound
c. a closed mouth technique
d. maximum pressure
e. none of the above
A
a
5
Q
when establishing balanced occlusion , the lingual cusps of the maxillary posterior teeth of the balancing side should contact the
a. buccal incines of the lingual cusps of the mandibular posterior teeth
b. lingual inclines of the lingual cusps of mandibular posterior teeth
c. central fosae of the mandibular posterior teeth
d. lingual inclines of the buccal cusps of the mandibular posterior teeth
e. none of the above
A
d
6
Q
in constructing a fixed bridge, if the gingival tissue cannot be succesfully retracted , the material of choice for taking the impression would be
a. modeling plastic in copper bands
b. rubber- base impression material
c. reversible hydrocolloid
d. irreversible hydrocolloid
e. none of the above
A
a
7
Q
failure of the partial dentures due to poor clasp design can BEST be avoided by
a. clasping only those teeth with fairly long crown and normal bone support
b. altering tooth contours as indicated by using a surveyor
c. providing branching arms
d. employing bar type clasps
e. employing stress breakers
A
b
8
Q
a toot hwhich ha not been 2in function and is now being used as an abutment may become symptomatic . thus MOST likely resultsfrom
a. overstress
b. a pulpal rection
c. localized osteoclastic activity
d. change in trbecular pattern
e. reaction wthin the periodontal ligament
A
e
9
Q
the lifting of a mandibular partial denture with distal extension bases maybe corrected by
a. narrowing the teeth
b. correcting occlusion
c. tightening the bracing arms
d. tightening the retention arms
e. reducing overetended boarders
A
e
10
Q
in order to compensate for the contraction of gold alloy modern dental investments make use of
a. hygroscopicexpansion
b. thermal expansion
c. setting expansion
d. all of he above
e. only A and B above
f. only A and C above
A
d
11
Q
in dentureconstruction, the patient is likely to experience the MOST discomfort from
a. nonanatomic teeth
b. excessive vertical openng
c. having the vertical dimension closed more than normal
d. a sliht error in centric occlusion
e. all of the above
A
b
12
Q
in processing methyl methacrylate , the resin may show porosity if the flask is placed in boling water. this type of porosity is MOST likely to occur
a. throughout the denture
b. in the thickest part of the denture
c. in thte thinnest part of the denure
d. close to the surface of the denture
e. close to the back of the denture
A
b
13
Q
a thin application of cavity varnish over the cut surface of a prepared tooth just prior to the cementation of a crown or a bridge with zinc phosphate cement will
a. impede the setting of the restoration
b. insulate the tooth against thermal change
c. increase the possibility of thermal sensitivity
d. reduce the possibility of irritation of the pulp
e. increase the possibility of leakage of the restoration
A
d
14
Q
excessive vertical dimention may result in
a. drooping of the corners of the mouth
b. increase and wrinkles around the lips
c. excessive trauma to he underlying supporting tissues
d. poor denture retention
e. loss of muscle tone
A
c
15
Q
which of the ff combinations will probably result in the LEAST occlusal wear?
a. glazed porcelin against acrylic resin
b. glazed porcelain against gold
c. unglazed porcelain against gold
d. acrylic against gold
e. gold against gold
A
e
16
Q
which of the ff is neccesary to solder successfully two adjacent metal alloy structures?
a. at least one of the metal alloy structures should be heated to its fusion temperature
b. both of the metal alloy structures to be joined should be heated to their fusion temperatures
c. neither of the adjoining metal alloy structures is heated to its temperature
d. the bulkier structure should be heated t its fusion temperature
e. none of the above
A
c
17
Q
where should grinding be accomplished if the ff conditions exist? the distobuccal cusp of th mandibular right first molar strikes prematurely in centric occlusion in thecentrl fossa of he maxillary first molar; the same cusp is found not be prematuere in working or balancing occlusio.
a. grind the fossa of the maxillary molar
b. grind the distobucal cusp of the manbibular molar
c. adjust the cusp tip and the fossa
d=. either A or B above is acceptable
e. all of the above
A
a
18
Q
what is the function of the face-bow with an intraorbital indicator? it records the
a. centric relatonsi of mandibular teeth to maxillary teeth
b. distance between the infrarbital plane annd the occlusal plane
c. relationship of maxilalry occlusal surfaces to the axis- orbital plane
d. relatonship of occlual surface of mandibular teeth to the temporomandibulr joint and the infraorbital plane
e. all of the above
A
c
19
Q
in the oral examination of a complete denture patient why should the saliva be evaluated?
a. a thin watery saliva does not afford luricating protection for the mucosa
b. a thick ropy saliva interferes with obtaining an adequate impression
c. xerostomia hinders adhesion and produces poor retention
d. all of the above
e. none of the above
A
d
20
Q
which of the ff groups of muscles is influential in molding the lingual border of the final mandibular impression for an edentulous patient?
a. hyoglossus, mylohroid, medial pterygoid, digastric
b. mylohroid , styloglossus, medial pterygiod, depressor anguli oris
c. palatoglossus, superior pharyngeal constrictor, mylohyoid, genioglossus
d. genioglossu, mylohyoid, middl pharyngeal constrictor, posterior belly of the digastric
e. none of the above
A
c
21
Q
why should the greates possible bearing arrea for a mandibular denture be used? to
a. increase tongue sace and to improve retention
b. provide balanced occlusion ant otincrease tongue space
c. improve esthetics and to aid in orienting the plane of occlusion
d. withstand forces of mastication and to increase effectiveness of the boarder seal
e. all of the above
A
d
22
Q
what is the PRIMARY reason for having full-mouth radiographs for an edentulous patient? to
a. aid in determining the denture bearign area
b. determine any geeral systemi debility that is affectig the tissues of the mouth
c. reveal any retained roots or residual areas of infection
d. reassure the patient that his previous dental care was adequate
e. none of the above
A
c
23
Q
running tap water over final casts of dental stone should be minimized because the completely set stone is soluble in water
a. both statement and reason are correct and related
b. both statement and rreason are correct but NOT related
c. the statement is correct but the reason is NOT
d. the statement is NOT correct but the reason is an accurate statement
e. NEITHER statement nor reason is correct
A
a
24
Q
maxillary anterilr teeth will give the BEST esthetic effect in a cmplete dnture if arranged
a. labially to the ridge
b. lingually to the ridge
c. over the crest of the ridge
d. to articulate with the mandibular anterior teeth placed over the crest of the ridge
e. none of these
A
a
25
when a reverse (buccal) 3/4 crown is indicated on mandiular molars, this is because
a. the reverse 2/4 crown is more esthetic
b. the bccal suface offers more retention than the lingual
c. on the mandibular arch it is easier to make a reverse preparation
d. anatomic form of the tooth and functional relationships determin the design of the restoration
e. all of the above
f. none of the above
d
26
the partial veneer crown is superior to a full crown from a periodontal viewpoint because
a. a healthy facial relationship between tooth and gingival margin is maintained
b. the margins of the restoration are not so deep in the gingival sulcus
c. there is less reduction of tooth structure
d. occlusion is not altered so much
e. none of the above
a
27
during postinsertion adjustment, errors in occlusion maybe checked MOST accurately by
a. directing the patient to close the jaws , bringing the teeth in to occlusion
b. having the patient close in occlusion and makig a transfer record to the articulator
c. having the patient leave the dentures out of the mouth for 24 hours
d. remounting the dentures in the articulator using remount cast and new interocclusal records
e. none of the above
d
28
the ONLY practical method by which the hinge axis can be accurately located is by
a. palpation with the condyle in their most retruded unstrained position in the glenoid fossa
b. meauring 11mm from the tragus on the ala-tragus line
c. trial and error using a face-bow with fully adjsutable condylar rods
d. measuring approx. 0.5 inch from the tragus on the traggus-canthus line
e. none of the above
c
29
the MOST important factor in selecting the proper shade of artificial teeth from complete dentures is the
a. patients age
b. type of tooth to be used
c. hair coloring and complexion of the patient
d. size of the teeth in relation to the arch
e. none of the above
c
30
```
diagnostic cast are used for helping to determine
I.which teeth should be etracted
II. which teeth require recontouring
III. which teeth require reconstruction
IV. areas requiring osseous and soft tissue surgery
the correct answer is
a. I, II, and III
b. I, III and IV
c. II, III, and V
d. all of the above
e. none of the above
```
d
31
in preparing a posterior tooth for a partial veneer crown, the proximal reduction should
I. converge 2degress - 5degrees gingivocclusally
II. diverge 2degress - 5degrees gingivocclusally
III. not be brought beyond the contact point buccaly to prevent the display of meta
IV. be carried suficienly buccally into cleanable areas
the correct answer is
a. I only
b. I and III
c. I and IV
d. II and III
e. II and IV
c
32
a fixed bridge is DIFINITELY contraindicated when
I. n opposing molar has extruded moderately int the edentulous space
II. the space length will require , for rigidity ,a beam of such dimension that embrasure will be greatly reduced in area
III. the bridge canot be costructed so that it can be kept clean by the patient to prevent caries and periodontal involvement
IV. one of the abutment teeth has been endodontically treated
the correct answer is
a. I, III and IV
b. II and III
c. III and Iv
d. all of the above
e. none of the bove
b
33
excessive wear on occluding surfaces of teeth usually results from
a. old age
b. mastication of food
c. disharmony between occlusion and centric relation
d. abrasive food contaminants
e. none of the above
c
34
the function of the ligaments around the TMJ is to
a. limit the movements of the mandible
b. maintain contact between articulating surfaces
c. help in the opening movement of the mandible
d. help in the lateral movement of the mndible
e. provide muscle attachments
a
35
in removing occlusal discrepancies to re-established central occlusion in complete dentures, harmony is restored generally by deepening fossae. However, cusps may be ground if they
a. do not contribute to working or balancing occlusion
b. interfere in balancing position
c. interfere in working position
d. all of the above
e. none of the above
a
36
an ADVANTAGE onf a metal -ceramic restoration as compared with n acrylic-faced crown is that the
a. dimensional stability of porcelain is better
b metal used can be cast and handled more easily
c. technique of construction is easier than with acrylic
d. all of the above
e. none of the above
a
37
```
in addition to gold, platinum and palladium , the composition of alloys for the metal ceramic restoration includes:
I. Fe
II. In
III. Sn
IV. Zn
V. Cu
VI. Ag
the correct answrer is
a. I, II and III
b. I, III, IV
c. I, IV, V
d. II, III, IV and IV
e. IV, V, VI
```
a
38
```
altering crown form to allow effective clasping may include
I. producing flat plane
II. changing the location of the height of the contour
III. adding additional bulk to the tooth
the correct answer is
a. I only
b. I and II
c. I and III
d. II only
e. II and III
f. III only
g. all of the above
```
g
39
```
absence of favorable contours of clasps design on an abutment tooth, can be overcome by
I. recontouring the enamel
II. changing the path of insertion used for surveying
III. gingivectomy
IV. constructing a crown
the correct answer is
a. I, II and III
b. I, III and IV
c. I and IV
d. II and Iv
e. all of the above
```
c
40
normal speech usually returns to a prosthetic patient within a few days after denture after reinserted . problems that do not occur may result from
a. improper tooth placement
b. excessive bulk
c. contour of the denture base
d. all of the above
e. none of the above
d
41
theMOST accurate material with which to record the occlusal surface of the maxillary teeth whe obtaining a facebow transfer is
a. soft wax
b. hard wax
c. modeling plastic
d. ZOE paste used alone
e. modeling plastic refined with ZOE paste
e
42
on anterior teeth , the MOST favorable area of placing a continous bar which is being used as an indirect retainer is
a. on the cingulum
b. close to the incisal edge
c. close to the gingival margin
d. midway between the incisal edge and the gingival margin
e. none of the above
d
43
facial margins of an anterior 3/4 crownshould be
a. lingual to the contact area
b. hidden in the contact area so the gold will not be visible from the facial aspect
c. extend facially to a cleanable area without destroying the facial contour of the tooth
d. well-extended to the facial surface to provide a sufficient area for a sound solder joint
e. lingual to the facial area
c
44
which of the ff characteristics is common to both alginate and hydrocolloid impression materials?
a. gelation of both materials is retarded by temperatuure increases
b. inaccurancies in the final impression can be caused by fracture of the fibrils during gelation
c. both materialscan be stored in humidors without any significant dimensional change
d. both materials can be converted from gels to sols
e. none of the above
b
45
what would be the effect of drying theprepared tooth with alcohol and warm air befoe cementation of a crown rather than wipping it dry?
a. possibilities of pulp damage are decreased
b. possibilities of pulp damage are increased
c. the set cement has increased crushing strength
d. the cements sets more rapidly
e. the cements sets less rapidly
b
46
which is MOST important in making a record of centric reltion for compete dentures?
a. allowing the patient to register his accustomed occlusal position in wax
b. using central bearing plates and a tracing device
c. having the patient in a relaxed , slightly reclining position
d. using stable recording bases
e. using translucent recording bases
d
47
which of the ff occlusal contacts should be corrected FIRST when doing selective grindin on a complete denture?
a. centric contacts
b. protrusive contacts
c. working side contacts
d. balancing side contacts
e. lateral protrusive contacts
a
48
imbibition, syneresis and hysteresis aree properties common to
a. plaster of paris
b. alginates
c. reversible hydrocolloid
d. silicone rubber base
e. polysulfide rubber base
c
49
trial dentures were constructed and balanced for protrusive occlusion on an adjustable articulator with the condylar guidance set at 25degrees on both sides .when thetrial dentures were tested in the mouth , the anterior teeth intefered when the patient protruded. this suggest that
a. the patients condylar inclination was greater than 25degrees
b. the patients condylar inclination was less than 25 degrees
c. cusp inclinations of the posterior teeth were ground too much for protrusive balance
d. the compensating curve was not inclined enough anteriorly
e. none of the above
a
50
the ridge lap of a pontic becomes enveloped with inflamed gingival tissue several weeks after cementation of the bridge. discomfort is increaed by biting pressure. bleeding occur while brushing . this conditions is usually caused by
a. a loose retainer
b. tissue displaccement by the pontic
c. insufficient gingival embrasures
d. lack of sufficient contact with the ridge
e. mechanical irritation caused by not removing excess cement
b
51
a dentist may advocate compete crowns on partial denture abutments. the BEST reason for this treatment is that
a. the caries problem is eliminated
b. periodontal problems can be controlled
c. more adequate occlusion can be achieved
d. abutment morpholgy can be controlled
e. none of the above
d
52
in using occlusal indicator wax to identify occlusal discrepancies between a removable partial denture and the natural dentition , it is BEST to
a. insert the wax bilaterally
b. use a double thickness of wax
c. insert the wax alternately between the right and left sides
d. introduce the wax into specific areas of the muth where suspected deflective occlusal contacts exists
e. none of the abve
a
53
```
in the metal-ceramic technique, "degrassing", the casting is required to
I. eliminate rresidual surface oil
II. remove gaseous impurities
III. oxidize trace elements in the metal
IV. eliminate oxidation
the correct answer is
a. I and II
b. I, and III
c. I and IV
d. I, II and III
e. I, II and IV
```
b
54
```
in a cold-curing denture resin, the activator is
I. hydroquinone
II. present in the liquid
III. sodium sulfide
IV.present in the poweder
V.a tertiary amine
the correct answer is
a. I and II
b. I and IV
c. II and III
d. II and V
e. IV and V
```
d
55
which of the ff causes of fracture or separation of porcelain from metal in the porcelain-fused-to-gold technique?
I. poor design of the metal framework
II. excess thickness of the opaque layer
III. occlusal contacts on porcelain
IV. contamination of metal before application of the opaque layer
V. centric occlusal contacts at the junction of metal and porcelain
VI. failure to use one of the metal conditioners before applying the opaque layer
the corrrect answer is
a. I, II and III
b. I, IV and V
c. I, V and VI
d. II, III and V
e. II, IV, and VI
f. II, IV and VI
b
56
why should the embrasure on the lingual between the maxillary lateral incisor and the maxillay canine be enlarge during outh preparation for a maxillary partial denture? to
a. prevent the partial denture fro slipping distally
b. prevent the partial denture fro slipping mesially
c. provide additional retention for the partial denture
d. provide adequate sace for a reciprocating arm
e. none of the above
d
57
which is the MOST appropriate procedure to correct occlusal discrepancies present in the processed dentures?
a. selective grinding after a laboratory remount; the dentures will then need no further occlusal adjustments
b. both a laboratory remount and a clinical remount before the dentures are properly adjusted by selective grinding
c. selective grinding in the mouth after the dentures are polished
d. there is no need for selective grinding because new techniques have eliminated occlusal processing errors
e. none of the above
b
58
ing examination of the edentulous patient wearing olddentures , the tissues under the denture base appear un-usually hyperemic with small petechial hemorrhages present. this conditions most likely resuls from patients
a. clenching his teeth
b. having an insufficient intake of ascorbic acid
c. eating and drinking foods that are too hot
d. using a mouthwash to which he is sensitive
e. none of the above
b
59
in soldering , the MAIN reason for leaving a narrow space between parts to be joined is to allow for
a. expansion of the soldier in solidification
b. cleansing of the parts
c. thermal expanson of the parts
d. uniform application of heat
e. thermal contraction of the parts
c
60
when a non-rigid connector is used, the path of insertion of the ear into the keyway should be parallel to
a. the path of insertion of the retainer carrying the keyway
b. the path of insertion of bth retainers of the bridge
c. the path of insertion of the retainer not involved in the keyway
d. all of the above
e. none of the above
c
61
a precision attchement emovable partial denture is referred when
a. abutment teeth are well suported
b. teeth are present on both ends of the edentulous areas
c. the patient is able to pay for the service
d. no posterior abutment teeth are present
e. abutment teeth require restoration
b
62
which of the ff considerations are LEAST important in fabrication a removable partial denture?
a. esthetics
b. mouth preparation
c. stress distribution
d. choice of partial dentures alloy
e. none of the above
d
63
which of the ff is the LEAS important reason for makng temporary aluminum protection on a prepared tooth? to
a. guard against chipping or fracturing of bases in the tooth
b. guard against sensitivity of the toth
c. maintain mesiodistal relationships
d. maintain occlusal relationships
e. all of the above
a
64
exposure of partial denture cast to tap water should be minimize because
a. the cast will be weakened
b. eroding of the cast will result
c. dimensional changes will occur in the cast
d. the surface of the cast will acquire a chalky apprearance
e. none of the above
b
65
it is often desirable to reduce occlusal interferences in the existing dentition before constructing a fixed prosthesis. the MAIN purpose for doing this is to
a. prevent trauma to the restoration
b. reduce the amount of adjusting of the restoration after insertion
c. maintain more accurate anatomical occlusal surface on the restoration
d. prevent duplicating the deflective occlusal contact in the restoration
e. none of the above
d
66
the incisal guide on the articulator is the
a. mechanical equivalent on the horizontal overlap and vertical overlap
b. mechanical equivalent on the compensating curve
c. same as the condylar guidance
d. horizontal guidance
e. none of the above
a
67
for the forces from a removable partial dnture to be properly directed through an abutment tooth, the seat for an occlusal rest should be prepared so that its floor is
a. parallel to the plane of occlusion
b. at the right angles to the minor connectors
c. at right angles to the long axis of the tooth
d. sloping apically from the center of the occlusal surface
e. none of the above
c
68
the MOST likely tissue reaction to gross overextension of a complete denture that has been worn for a long time is
a. epulis fissuratum
b. pyogenic granuloma
c. papillary hyperplasia
d. giant cell reparative granuloma
e. none of the above
a
69
heating gympsum casting investments above 1,300degrees F in the presence of carbon results in
a. shrinkage porosity
b. fine grain size
c. sulfur gases being released
d. oxidation of castings
e. none of the above
c
70
in order to obtain GREATEST accurancy of dies, a rubber-base impression ofprepared abutment teeth is taken directly with
a. as much bulk of impression material between the tray and the teeth as possible
b. a tray which has been formed from a previously made cast of that patient
c. the smallest poaaible bulk bulk of impression material
d. a stock tray
e. none of the above
b
71
major connector of a maxillar ypartial denture maybe beaded in order to
a. produce a stronger frameform
b. aid in retention of the denture
c. retain the acylc to the metal framework
d. produce a positive contact against the tissue
e. form a finish line between metal and acrylic
d
72
a type III gold alloy casting, which is quenched from a temperature of 1300degrees F , exhibits
a. a solid solution and is in the softened condition
b. an eutectic mixture and is in the softenend condition
c. an intermettalic compound and is in the hardened condition
d. an intermettalic compound and is in the softened condition
e. none of the above
a
73
for both the "sh" and "s" sounds, the tongue makes contact with the
a. canines
b. hard palate
c. maxillary premolars
d. maxillary second molars
e. soft palate
c
74
a factor which determinesthe effectiveness of condensation in the prevention of porcelain shrinkage in the
a. shape and size of the prticle
b. thickness of the platinum mix
c. speed of increase of furnace heat
c. use o a powder containing particles that are all the same size
e. none of the above
a
75
a child 14 yrsof age, has all teeth present ,normal occlusion , molar roots not fully calcified. the mandibular right first molar has a pthologic pulp exposure, endodontics is conttraindicted and the tooth must be extrcted.
the subsequnt treatment indicated would be to
a. place a removable partial denture
b. place a fixed partial denture
c. place a space maintianer
d. place any one of the above appliances
e. do nothing and observe
c
76
why would a gold alloy from the type III group NOT be selected for a simple inlay?
a. this alloy is too ductile and would , therefore, readily distort plastically in service
b. hardnessis so high that it would cause dangercus tooth abrasion
c. elongation qualities are too low to allow for marginal adaptation
d. the melting temperature is considerably higher than that of class II gold alloys
e. elastic strength is too high
c
77
which of the ff maxilomandibular records permits the LEAST variation and is the most producible record?
a. centric reltion
b. lateral relaion
c. protusive relation
d. occlusal vertical dimension
e. B and C above
a
78
```
of the ff , the LEAST likely reason to recall patients treated with fixed bridges is to
a. check tissue adaptation
b. check retainers for wear
c. check home care
d. check occlusal condition of the ridge
e. adjust occlusal disharmonies
q
```
b
79
when dental plaster ( 50ml water/100gm plaster) and improve stone (densite) (23m water/100gm stone) are compared, dental plaster are
a. has the higher dry compressive strength
b. has the higher wet compressive strength
c. has the higher setting expasion
d. causes a higher temperature rise during setting per unit volume
e. none of the above
c
80
the constituent of cobalt-chromium alloy which makes its corrosion resistance equal to that gold is
a. silver
b. nickel
c. cobalt
d. tungsten
e. chromium
e
81
an open vertical dimension may ADVERSELY affect
a. retention
b. protrusion
c. centric reltion
d. balanced occlusion
e. interocclusal clearance
e.
82
a protrusive relation record is used to
a. adjust the facebow
b. record central relation
c. adjust the incisal guide
d. mount hte mandibular cast
e. adjust the condilar inclination
e.
83
a denture patient who complained of a tingling sensation in the lower lip would most likely need tot have the mandibular denture relieved in the area of the
a. labial frenum
b. mental foramen
c. sublingual gland
d. centric foramen
e. none of the above
b.
84
radiographs are an aid to determining prognosis because the reaction of he bone that supports the abutment teeth can be judged by the
a. shape of the roots of abutment teeth
b. amount of bone loss due to extractions
c. reaction of the bone to previously induced stress
d. all of the above
e. none of the above
c.
85
in posterior fixed bridge , a ponticshould be in
a. infraocclusion to reduce the load placed on the appliance
b. supraocclusion to insure good function
c. occlusal contact in centric, in working and in balancing
d. contatc in centric occlusion , may or may not be in contatc in working , but not in contatc in balancing
e. none of the above
d.
86
the size of posterior teeth for complete denture is PRIMARY determine by
a. the size of anterior teeth
b. the circumference of the maxillary arch
c. the distance from the canines to posterior denure boarders
d. a combination of anterior tooth space and the posterior tooth space
e. useful posterior tooth space and characteristics of denture-supporting tissues
e.
87
the scoring of teh alatal bar on the cast is
a. necessary to give the major connector the required rigidity
b. carried across the entire length of the posterior palatal bar
c. carried across the entire length of the anterior palatal bar
d. limited t the arreas of soft displaceable tissue
e. none of the above
d.
88
a removable partial denture framewok is BEST accomplished by the
a. edentulous areas are nuerous
b. adentulous areas are long
c. abutment teeth are short
d. abutments are rotated
e. abutment teeth are tipped
b
89
bracing of the partial denture framework is BEST accomplished by the
a. rigid reciprocal arm and the boduy of the clasp
b. rigid reciprocal arm and the flexible part of the retentive arm of the clasp
c. rigid reciprocal arm of the clasp
d. retentive arm and the occlusal rest
e. none of the above
a.
90
bracing of the partial denture framework is BEST accomplished by the
a. rigid reciprocal arm and the boduy of the clasp
b. rigid reciprocal arm and the flexible part of the retentive arm of the clasp
c. rigid reciprocal arm of the clasp
d. retentive arm and the occlusal rest
e. none of the above
a.
91
after partial dentures are processed and before removing them from the master cast , possible errors in occlusio should be checked by
a. remounting the dentures on the articulators using previos remounting
b. remounting the dentures on an articulator after registerig a new centric relation record in the patients mouth
c. having the pateint use an abrasive past in the mouth
d. checking the cuspal interference in the mouth using articulating paper
e. either C or D above
a.
92
all other conditons being normal , the IDEAL posterior pontic is constructed of
a. gold exclusively
b. gold with resin facial surfaces
c. gold woh a fused porcelain facial surface
d. porcelain on the occlusal surfaceand gold approximating ridge
e. gold on the occlusal surface and glazed porcelain approximating the mucosa
e.
93
patients wearing partial dentures should return for periodic examination PRIMARILY because
a. adjustments of retainer arms maybe neessary
b. caries maybe present under the retainer arms
c. oxidized metal surfaces maybe need polishing
d. changes in supporting tissues may have occured
e. none of the above
d.
94
examination of the edentulous patient reveals tuberositiescontacting retromolar pads when the mandible is at rest position.the MOST acceptable treatmentplan would be to
a. procees with denture constuctin and increase the vertical dimension for the necessary clearance
b. proceed with denture construction and trim the retromolar pad areas from the finished mandibular denture to eliminate interferences
c. reduce the retromolar pad areas surgically to gain adequate clearance before proceeding with construction of the dentures
d. reduce the tuberosities surgically to gain adequate clearance before proceeding with construction of the dentures
e. none of the above
d
95
after the maxillary cast has been correctly mounted on the articulator , the functionally correct relation of the mandibular cast to themaxilary may be established by using
a. an index made in centric relation but short of tooth contact
b. the cusps and the sulci of the remaining teeth has a guide for a relating the mandibular cast to the maxillary
c. a mushbite wax index in which the patient ha brought the mandibular teeth in to maximal contac with the opposing teeth
a
96
in establishing the proper tilt of the surveyor table when surveying casts, the dentist would FIRST
a. use an arbitrary tilt to create undercuts
b. locate undercuts with casts placed on a horizontal plane
c. adjust the tilt to permit the establishment of parallel bracing planes
d. established an anterior tilt for the maxilalry cast and posterior tilt for the manbibular cast
e. none of the above.
c
97
in placing a fixed bridge in one quadran of a dental archwhere conditions are asymptomatic, a dentist should routinely
a. equilibrate the entire occlusion
b. construct the replacement to conform with the existing occlusion
c. equilibrate the opposing quadrant and construct the bridge to its occlusal pattern
d. record centric relation to permit evaluation of the occlusion prior to fixed prosthdontic construction
e. none of the above
d.
98
ridge tissue tolerates some materials better than others. which of the ff are true?
I. highly glazed porcelain is tolerated better than highly polished gold
II. highly polished porcelain is tolerated better than highly polished acrylic
III. highly polished porcelain is tolerated better than unglazed porcelain
IV. highly polished acrylic and highly polished gold are about equally tolerated
the correct answer is
a. I, II and III
b. I, II and IV
c. II, III, and IV
d. II, and IV
e. I, II, III, IV
a.
99
```
the lateral pterygoid muscle functions t
I. elevated the mandible
II. protrude the mandible
III. lift the mandible from the pterygoid plate
IV. move the mandible to the opposite side
the correct answer is
a. I and II
b. I and III
c. I and IV
d. II and III
e. II and IV
f. III and IV
```
e
100
```
which of the ff MOST influenced cast positioning in surveying for removable partial denture design?
I. location of undercuts for retention
II. number of missing teeth
III. esthetic requirements
IV. ease of insetion and removal
V. relation to the opposing cast
the correct answer is
a. I, II and IV
b. I, III and IV
c. I and IV
d. II and IV
e. III and V
f. all of the above
```
b
101
```
in selecting anterior teeth, for complete denture pateints, one considers the patients
I. facial size, shape and form
II. age
III.sex
IV. physical features
the correct answer is
a. I, II, III
b. I, II, IV
c. I, IV
d. all of the above
```
d.
102
redness and soreness, limited to the crest of the edentulous ridge supporting a removable partial denture, are indicative of a
I.lateral prematurity during the working movement
II. lateral prematurity during the nonworking movement
III. centric prematurity
the correct answer is
a. I only
b. II only
c. Ii, III
d. III only
e. all of the above
f. none of the above
d.
103
```
factors which infuence the functional harmony of fixed prosthetic restorations include:
I. obtaining an accurate centric relation registration
II. eliminating poor masticatory habits
III. establishing connectors of maximum occlusogingival dimension
IV. developing maximum occlusal contact
V. the adaptive ability of oral tissues
the correct answer is
a. I, II, IV
b. I, II, V
c.I, III, IV
d. II, III, V
e. II, IV, V
```
b.
104
```
in order t achieve optimum casting results in the metal ceramic technique, it is necessary to use a
I. gympsum bonded investment
II. phosphate -bonded investment
III. properly adjusted gas-air torch
IV. carefully cleaned crucible , prior use of which has been limited to type III gold alloy
the correct answer is
a. I only
b. I, III
c. I, III, IV
d. II only
e. II, III
f. II, III, IV
```
d.
105
```
two days after insertion of a distal etension saddle partial denture, which appeared stable at the time of insertion , the prosthesis displays obvious tissueward movement. the cause maybe
I. an inaccurate master cast impression
II. high occlusion requiring correction
III. changes occuring in the ridge form since the mater cast impression was made
the correct answer is
a. I only
b. I, II
c. II only
d.II, III
e. all of the above
f. none of the above
```
c.
106
properly mounted diagnostic casts facilitate planning for
I. abutment preparation design to assure retentive
II. axial alignment of abutment preparations and sequence of treatment procedure
III. aesthetic considerations and selection of pontic type
IV.adequate crow-root ratios
V. correction of existing occlusal disharmonies
VI. appraisal of tissue contour in pontic areas and presence of periodontal pockets
the correct answer is
a. I, II, III, IV
b. I, II, III, V
c. I, II, III, VI
d.I, II, IV, VI
e. II, III
f. II, III, IV, VI
g. II,IV
h. II, IV, V, VI
b.
107
```
in planning a fixed prosthesis, the amount of bone support around the roots of abutment teeth is of major concern. IMPORTANT to this evaluation is
I. root length
II. crown length
III. number of roots
IV. properly devitalized pulp canals
V. fused or bifurcated roots
the correct answer is
a. I, II, III
b. I, III, V
c. I, IV, V
d. II, III, IV
e.II, IV, V
f. ll of the above
```
b.
108
the non-rigid connector maybe used in fixed bridges in those cases involving:
a. long span replacing two or more teeth
b. short span bridges replacing one missing tooth where the prepared abutment teeth are not in parallel alignment
c. long span bridges opposing a mucosa -borne partial denture where the anterior retainer of he bridge strikes an opposing natural toot, but the distal portion of the bridge is in occlusion with the removable partial denture
d. long or short span bridges where one of the abutment teeth has limited periodontal support
b.
109
freeway-space is synonymous with
a. physiologic rest position
b. interocclusal distance
c. interdental arch space
d. intermaxillary space
e. both A and B
b.
110
effects of cooling the mixing slb prior to cementation include:
a. increasing the amount of powder that can be incorporated into the mix
b. increasing the setting time in the mouth
c. increasing the setting time in the slab
d. decresing free acid in the set cement
e. only A and B above
f. only B and C above
g. only C and D above
h. all of the above
e.
111
after extractions and haling , the maxilaly denture bearing area discloses bony undercuts in both tuberosity areas. USUALLY, the BEST treatment for this conditions is to
a. surgically reduce the undercuts just enough to allow a path of insertion
b. do no surgically trimming on the ridge, but reduce the denture base in the undercut area
c. use soft liner inserts in tuberosity areas of maxillary dentures
d. reduce both bony undercut tuberosities so no bony undercut exists anywhere on the ridge
a.
112
dental plaster powder differs from dental stone powder PRIMARILY in
a. chemical formula
b. crystal structure
c. solubility in water
d. physical nature of the particle
d.
113
the strength of a soldered joint is BEST increased by
a. using a higher carat solder
b. increasing its dimension in a direction parallel to the force to be applied to it
c. increasing its dimension in a direction perpendicular to the line of force to be applied to it
d. increasing the width of the joint by having a space of atleast 0.05 inch between the arts to be soldered
e. electroplating the joint with gold to prevent corrosion
b.
114
three weeks after insertion of a fixed bridge, marked discomfort to heat and cold but not sweets occurs. the MOST likely cause is
a. gingival recession
b. unseating of the bridge
c. deflective occlusal contact
d. torsional forces on one abutment tooth
e. incomplete coverage of cut surfaces of prepared abutment teeth
c.
115
in arranging prosthetic teeth for balanced occlusion, increasing the incisal guidance
a. increases the condylar guidance
b. decreased the height of the cusps
c. increases the compensating curve
d. increases the plane of orientation
c.
116
the GREATEST cause of porosity in a porcelain jacket crown is
a. moisture contamination
b. excessive firing temperature
c. failure to anneal the platinum matrix
d. excessive condensation of the porcelain
e. inadequate condensation of the porcelain
e.
117
to impart a softening heat treatment to a dental gold alloy, the BEST method would be to
a. pickle the casting in a weak acid
b. quench the hot casting in cold water
c. bench cool from casting temperature to room temperature
d. reheat the coold casting to 700degress F, hold at that temperature for 30 minutes , and bench cool
b.
118
a patient complains of pain when brushing a tooth which has a complete veneer cast gold crown.the MOST probable cause of this pain is
a. occlusal interfrrences in centric and working relations
b. failure if the restoration to cover prepared dentin
c. overheating the tooth during preparation
d. open mesial or distal contacts
a
119
the cast-wrought combination clasps in DESIRABLE
a. because it cannot be adapted
b. only when used with extension base parial denture
c. because it offers no stress-breaking action
d. bacause of its ability to flex in all direciins
e. none of th above
d.
120
porcelain bonded o metal is STONGEST when it is
a. slowly fired
b. under trndion
c. under comoression
d. fired several times vefore completion
c.
121
splibting sveral teeth together as abutments for a fixed prosthesis is done to
a. distrubute occlual load
b. improve retension of the prosthesis
c. facilitate plaque control
d. preservevrrmaining alveolar support
e. assure iptimum dedign of embrasures
a.
122
a two-stage impressions techniwue maybe considered for partial denture constructiin PRIMARILY bevause
a. it provides a more accurate impressiin of the abutment teeth
b. it provides a more accurate impressiin of the soft tissue
c. resilient and nonresilient tissues are involved
d. it enables the dentist to border mold
e. both B and D above
f. none of the above
c.
123
a patient in excellent health and wearing complete dentures complains of a birning sensation in the anterior palate. this is MOST likely causef by
a. a nicotamide deficiency
b. deflective occlual contact
c. failure to relieve the incisal papillae area
d. excessive thickness of the denture in the rugae area
c.
124
to locate a hinge acis on a patient,one should use
a. a simole face-bow
b. a kinematic face-bow
c. eccentric records
d. centric relstiin registration
b
125
for a posterior abutments with acceptsble crown-root ratios, average croen length and normal esthetic requirements,the reatiner of choice is a ______ crown.
a. full
b. partial venner
c. resin veneer gold
d. metal-ceramic bonded
b.
126
a patient has a complete maxilalry denture against natural teeth. he complains of pain in the area of the left tmj. examination of postetior teerh indicates that these teeth contact first on the right side. patient theb slided forward and to the left to effect good cusps interdigitation. what tteatment procedure should be institutef to relivef this patients symptoms?
a. markedly refuce the cusps height of the mandibular posterior teeth on the right side
b. grind the right posterior teeth to a flat plane
c. re-evaluate and correct the posterior occlusion
d. reduce the occlusal vertical dimension
c
127
why should a clear surgical template be used for an immediate drnture?
a. to aid the dentist in placing sutures
b. to prevent bleeding for the girst 24hours
c. as an aid in trimming bine to fit the immediate denture
d. to facilitate shortening the borders so the dentuted will fit securely
c
128
whre should grinding be accomolish if the ffconditions exist?. the distobuccal cusp of the mandibular right first molarstrikesprematurely in centric occlusion in the central fossa of the macillary first molar; the distkbuccal cusp of the mandibular right first molar is not premature in working or balancing occlusion.
a. grind the central fossa of macillary molar
b. grind the distobuccal cusl of the mandibular molar
c. adjust theccusl tip and the fossa
d. either A or B above is acceptable
a
129
the ridge tissue tolerstes highly
I. polished gold better tgan unglazedporcelain
II. plazed porcelain bette than higly polished gold
III. polished porcelain betterthan highlg polsiheda rylic
IV. polished acrylic and highly polished hold about the same
the correct answer is
a. I only
b. I, II, III
c. I, II, IV
d. only
e. II, III, IV
b
130
the mesiobuccal cusp of the mandibular left first molar is in deflective occlusal contact in centric occlusion but not in lateral excursuins.what might be spot-ground to effect a balanced occlusion? the
a. mesiobuccal cusp of the mandibular right first molar
b. marginal ridges of the maxillary first molar and second premolar
c. mesiobuccal cusp of the macillary left first molar
d. distolingual cusp of thd mandibular left first molar
b
131
seventy-two hours inserting a relineddistak extension partial prosthesis. vertical movement of the base is noted. cause would LIKELY be:
I. ridge tissue changes occuring since the reline imprrssion
II. failure to properly orirnt the metsl frsmework to thr contscted teerh during relinr imprrssion procedured
III. prematured occlusal contacts
the correct answer is
a. I Only
b. I, II
c. I, III
d. II, III
e. III only
f. all of the above
d.
132
which of the ff procedures must be executed in order to obtain the MOST accurate possible casts from alginate impression?
a. box the impression before pouring
b. pour the impression immediately
c. leave the cast in the impression atleast ine hour before separating
d. store rhe impression in water for one hour before pouring
e. store the impreddion in a humidor for one hour before pouring
f. none of the baove
b.
133
```
the amount of effective setting expansion of a casting investmenr may vary depemding in the
I. type of sprue pin used
II. typeof gold alloy used
III.type of casting rung used
IV. compksition of the wax and type of pattern
the corrext answer is
a. I, II,IV
b. I, III, IV
c. II, III, IV
d. II, IV
e. III only
f. III, IV
g. IV only
h. all of the above
```
f.
134
selective grjnding is a procedure used ROUTINELY
a. to reduce the verticsl dimension of occlusion
b. to reduce the inclinstion of condylar guidance
c. for final corrrction of any existing occlusal disharmong in dentures
d. to improve the esthetics of the final arrangement of the anterior teeth
c
135
elements contributing to a sarisfactory bond beteeen the casting and porcelain in the metal-cersmic technique ( ceramco- type alloy ) are
a. Au, Cu, Ag
b. Au, Pt, Pd
c. Pt, Pd,Sn
d. Fe, Cu, Au
e. Fe, Sn, Au
e.
136
an ADVANTAGE of a wide, thin palatal bar as comparedwith a narrow bar is that the wide bar
a. can be adequately rigid with less apparent bulk
b. is easier to polish
c. is more stable
d. is less irritating to the sodft tissue
a.
137
the MOST importsnt considerstion in checking custom trays accurate muscle molding is
a. stsbility
b. a tight posterior seal
c. stability and lack of displacement
d. a tight periphersl seal disregarding displacement
c.
138
a broken stress or non-rigid type fixed bridge is indicated when
a. retsinerd can be designed to have equal retentive qualities
b. two or three missing teerh are to be replaced
c. constructing a mandibular fixed partial bridge only
d. fixed splinting involves two or three abutmrbt teeth
e. retsinerd cannot be prepared to draw togerher without excessive tooth reduction
e.
139
when a patirnt wearing completr dentured makes a whistling sound while enkunciating the "s" sound, it is caused by
a. the anterior teeth being placed too far labially
b. the anterior teeth being placed too far linguslly
c. too grest a vertical overlap
d. too palatal vault being too high and narrow
a.
140
the shape snd amount of distobuccal extendiom of a complete mandibular edentulous impression is determined during bosrder molding by the
a. ramus of the mandibke
b. latersl pterygoid
c. tone of the buccinator muscle
size and location of the buccal frena
e. position and action of the masseter muscle
e.
141
the calcium sulfate tupe of investment for gold castings is NOT generslly hested above 1300 degrees F because
a. it may expand too much
b. fhe gold will expand excessively
c. the coeffficient of thermolinear expansion chsnges
d. decomposition will cause corrosion of the gold
d.
142
in rrcording centricreltaiin , the mandible can be retruded by having the patrint
a. relax the jaw muscles while the dentist manually manipulates the chin up and down
b. protrude and retrude the mandible repeatedly
c. turn rhe tongue bavkward toward the posterior border of the palate
d. Make repeated swallowing movements
e. All of the above
e.
143
the FREQUENT cause of distortion of a rubber base impression of a bridge preparation area is
a. Improper base accelerator ratio
b. Prolong mixing of the material
c. Failure to retract the gingival tissue properly
d. Removal of the impression prior to the complete set of the material
d.
144
The path of the condyle during free mandibular movements is governed PRIMARILY by the
a. Height of the cusp of the posterior teeth
b. Amount of horizontal and vertical overlap
c. Vertical dimension centric relation and degree of the compensating curve
d. Shape of the fossa and meniscus and the muscular influence
d.
145
Abutment teeth for removable partial denture should be contoured so that the retentive clasp tips can be placed
a. On the gingival third of the crown
b. On the middle third of the crown
c. In the distal undercut
d. In a mesial undercut
e. None of the above
A
146
The dentist can BEST control the setting time of an irreversible hydrocolloid by altering the
a. Mixing time
b. Water powder ratio
c. Temperature of the water
d. Amount of retarder or accelerator added
c.
147
The physiologic rest position has practically significant during the evaluation of maxillomandibular relations specially as related to
a. Centric relation
b. Centric occlusion
c. Vertical dimension
d. Protrusive occlusion
c
148
As compared with gold alloys cobalt-chromium casting alloys
a. Are less rigid
b. Are generally softer
c. Melt at a higher temperature
d. Have a lower tensile strength
e. Are more readily attack by mouth fluid
C
149
Maxillary permanent first molar has extruded 1 1/2mm beyond the plane of occlusion into the space where the corresponding mandibular molar is missing this situation would be CORRECTED by
a. Constructing a mandibular fix bridge to the existing occlusion
b. Extracting the maxillary extruded molar and constructing fixed bridge for both spaces
c. Restoring the maxillary molar to a satisfactory plane of occlusion with a cast restoration then constructing the mandibular bridge
d. Cutting the maxillary extruded molar off and working cast constructing the mandibular bridge and equilibrating the maxillary molar to the new occlusal plane after the mandibular bridge is cemented
e. Carefully reshaping and polishing the molar to an acceptable occlusion plane by selective grinding then constructing the mandibular bridge
d
150
the MOST reliable method of recording centric occlusion when constructing a mandibular bilateral distal extension partial denture occluding with natural teeth is to construct a stabilized occlusion rim
a. For the mandibular master cast and record the relationship with base plate wax
b. For the mandibular master cast and record the relationship with utility wax
c. For the mandibular master cast and record the relationship with zinc oxide eugenol registration paste
d. Attached to the finished partial denture frame and record the relationship with zinc oxide eugenol registration paste
D
151
Both porcelain and acrylic resin teeth are used in prosthesis. Both are secured to the base during processing the CORRECT anchorage is
a. Both are chemical reunited with the resin base
b. Both are held to the base in a mechanical bond
c. The anchorage of both kinds of teeth is both chemical and mechanical
d. Resin teeth are mechanically held to the base and porcelain teeth are chemically bonded to the base
D
152
Within practical limits using less water in mixing plaster will result in a set product that
a. Contracts
b. Is stronger
c. Is More porous
d. Is less brittle
e. Is more flexible
B
153
The setting time of a zinc oxide eugenol impression paste may BEST be accelerated by
a. Adding a drop of oleic acid to the mix
b. Chilling the mixing slab and the spatula
c. Adding a drop of water to the
d. Increasing the amount of
e. Increasing the amount of zinc oxide
C
154
Heating a gypsum cast at a temperature of 110° celsius for 1 hour will
a. Drive off its excess gauging water only
b. Have minimal effect on its crushing strength
c. Weaken it because its water of crystallization is driven off
d. Strengthen it because it is a recorded fact that the dry crushing strength of gypsum is high when compared with the wet crushing strength
e. None of the above
C
155
Asbestosis is used as a lining in a casting ring to
a. Insulate against thermal conductivity
b. Allow for expansion of the investment
c. Prevent fracture of the investment during heating
d. Facilitate removal of the investment after casting
e. All of the above
B
156
Heating gypsum casting investment above 1300 degrees fahrenheit in the presence of carbon results in
a. Fine grain size
b. Shrinkage porosity
c. Oxidation of casting
d. Sulfur gases being released
e. All of the above
d
157
A type 3 gold alloy casting which is quench from a temperature of 130° fahrenheit exhibits an
a. Intermetallic compound and is in the hardened condition
b. Intermetallic compound and is in the softened condition
c. Eutectic mixture and is in the hardened condition
d. Solid solution and is in the softened condition
e. Solid solution and is in the harden condition
Di
158
A base metal partial denture alloy isRESISTANT to tarnish and corrosion because of it
a. Passivity
b. High hardness
c. High fusion temperature
d. High noble metal content
e. Activity
a.
159
For a MORE rigid structure a base metal partial denture alloy should be selected rather than Type 4 gold because the alloy has a
a. Lower elongation
b. Higher modulus of elasticity
c. More favorable tensile strength
d. Higher hardness number
e. Higher ductility
B
160
a DISADVANTAGE off a polyether impression material is its
a. Low modulus of elasticity
b. Low coefficient of thermal conductivity
c. Consistency very similar to the reversible hydrocolloid
d. Dimensional instability in the presence of moisture
e. Low conductility
d.
161
What is the ADVANTAGE off using higher fineness gold solders rather than lower finest gold solders ?
a. Greater hardness
b. Lower melting range
c. Greater resistance to tarnish
d. Greater response to hardening heat treatment
e. All of the above
c
162
In processing methyl methacrylate the resin may show porosity if the flask is placed in boiling water . Where in the denture is this type of porosity most likely to occur ?
a. Throughout
b. In the thickest part
c. Near the borders
d. Close to the surface
e. On the tissue surface
b
163
Polysulfide impression materials set FASTER as a result of
I. Low relative humidity
II. Decreasing the temperature of the mixing pad below the dew point of the room
III. Decreasing the temperature of the mixing slab
IV. a high ambient temperature
the correct answer is
a. I, II, IV
b. I, III
c. II ONLY
d. II. IV
e. IV ONLY
d.
164
```
In the metal ceramic technique the bond between porcelain and the noble metal alloy is dependent on the
I. Proper matching of coefficient of thermal expansion
II. Formation of base metal oxide
III. Formation of noble metal oxide
IVSurface roughness of the alloy
the correct answer is
a. I only
b. I, II
c. I,II
d. II,IV
e.III, IV
```
b
165
```
In casting the metal substructure for a metal ceramic restoration it is necessary to use a
I. Gypsum bonded investment
II. Phosphate bonded investment
III. Gas air torch
IV. Crucible which has not been used for other gold alloys
the correct answe is
a.I, III
b. I, IV
c.II ONLY
d. II, III
e. II, IV
```
e.
166
```
In patients with complete dentures fissures found at the corners of the mouth are MOST frequently caused by
I. avitaminosis
II. Insufficient vertical dimension
III. Blood dyscrasia
IV. general hyperactivity
the correct answer is
a. I, II
b. I, II, III
c. I, III
d. II, III
e. II, III, IV
```
a.
167
The forces acting through a fake fixed partial denture on the abutment tooth should be directed
a. as far as possible at right angles to the long axis of the teeth
b. parallel to the long axis of the teeth
c. by decreasing the facio- lingual dimension of the pontic
d. by decreasing the mesio-distal dimension of the pontic
e. in mesial direction so that teeth nearer the midline will offer additional support
the correct answer is
a.I , III, IV
b. I, III, V
c. I, IV, V
d. II, III
e. II, V
d
168
In order to maintain the health of the tissue beneath a pontic it is desirable to
I. scrape the rich area on the cast and use gold for the ridge contact
II. scrape the ridge area on the cast and use porcelain for the ridge contact
III. have passive contact with the ridge tissue with no blanching a parrent when the restoration is placed in the mouth
IV. have slight blanching of the ridge tissue when the restoration is placed in the mouth
V. have minimal tissue coverage
the correct answer is
a. I, IV
b. I,V
c. II, III
d. III,V
e. IV,V
d.
169
A permanently cemented fixed partial denture may become loose because of
I. insufficient retention in the abutment preparation
II. deformation of the metal casting on the abutment
III. lack of embrasure space
VI. torque
V. passive contact of the pontic to the ridge lap
the correct answer is
a. I, II
b. I, III
c. II, III
d.II, IV
e. III,IV
b
170
In posterior palatal seal for maxillary denture
I. is placed immediately posterior to the vibrating line
II. helps to compensate for the lack of the adaptation caused by shrinkage of acrylic
III. is not necessary if a metal base is made IV.will vary in outline and depth according to the palatal form encountered
the correct answer is
a.I, II
b. I,III
c. II,III
d. II,IV
e. III,IV
d
171
From properly mounted diagnostic cast determinations can be made for fix prosthodontic treatment planning concerning
I. axial alignment of abutment teeth
II. physical condition of abutment teeth
III. gingival tissue and pocket depth
IV. tentative design of abutment preparation the correct answer is
a. I only
b. I,II
c. I,II III
d. II,IV
e. all of the above
c
172
```
For achieving a natural appearance in complete denture anterior teeth must appear separate and distinct from one another this may be accomplished by employing the estimate
I. diastemata
II. the shadow effect
III. different shades of teeth
IV. wedge-shaped spaces at the incisal third
the correct answer is
a. I only
b. I, II
c. I, II, III
d.II, IV
e. all of the above
```
e.
173
In partial denture construction a dental surveyor should be used
I. to determine the path of insertion
II. to determine the design
III. in conjunction with mouth preparation
IV. to determine the depth of rest seat the correct answer is
a. I ONLY
b. I, II
c. I,II,III
d. II,IV
e. all of the above
c
174
in closing movement of the mandible is affected by the
I. synergistic action of lateral pterygoid and depressor muscles
II. relaxation of the lateral pterygoid muscle synergism of retracting portion of masseter and temporal muscles and the retracting components of the depressors
III. contraction of the deep portion of matter masseter and posterior fibers of temporal muscles combining forces with the depressors (digastric and geniohyoid)
IV. contraction ofthe elevators
the correct answer is
a. I, II, III
b. I , III, IV
c. I,IV, V
d. II, III, V
e. II, IV, V
d.
175
To be acceptable for repair an existing removable partial denture should have an
I. acceptable fit of the metal to the teeth
II. rigid major connector properly located with relation to teeth and tissues
III. acceptable design
IV. framework that can be position positively and predictably without the missing part
the correct answer is
a. I, II, III
b. I, II, IV
c. I, III, IV
d. II, III, IV
e. all of the above
e
176
```
Altering crown form to allow effective clasping may include
I. producing flat plains
II. changing the location of the height of contour III. adding back to the tooth
the correct answer is
A. I, II
B. I, III
C. II, III
D. III only
E. all of the above
```
e
177
```
Reciprocal arm of a circumferential clasp should be ALWAYS
I. contact a guiding plane near its tip
II.contact a guiding plane near its attachment attachment to the minor connector
III. contact a guiding plane approximately 180 degrees around the tooth from its
IV. tip be rigid
V. be flexible
the correct answer is
a. I, IV
b. I,V
c. II, IV
d. II, V
e. III, V
```
c
178
At the trial try in of maxillary mandibular complete denture the f sound disclosed the upper incisor edges of the tip just making contact with the wet line of the lower lip reduction that period production of the civil and sibilant sound suggest that the mandibular anterior teeth are in a protrusive relation with no vertical overlap it may be concluded that
I. maxillary anterior teeth are correctly set for length
II. maxillary anterior teeth r set with insufficient facial fullness
III. vertical dimension of occlusion is too great IV. mandibular anterior teeth are set too far facially
V. mandibular anteriorteeth are too long
the correct answer is
a. I, II
b. I, IV
c. II, III
d. II, V
e. II, V
b
179
A patient with a removable partial denture is dissatisfied with the FALSE appearance of the mandibular anterior teeth . The dentist could correct this appearance by
I.moving the teeth further lingually so that they are not so obvious
II. varying the inclinations of the incisor source so that alternate teeth appear tilted
III. Moving that teeth farther facially so that there are parents is enhance appearance is enhance IV. separating the teeth slightly to make each one look distinct
the correct answer is
a. I, III
b. II, III
c. II, IV
d. III only
e. any of the above
c
180
INCREASED back in the major connector is necessary if the
I. major connector is shorter than usual
II. major connector is longer than usual
III. framework is to be made of gold rather than cobalt chromium
IV. framework is to be made cobalt chromium rather than gold
the correct answer is
a. I only
b. I, III
c. I, IV
d. II only
e. II, III
e
181
```
Mounted diagnostic cast in removable partial denture treatment planning are essential for selecting the
I. type of denture base
II. areas for support
III. areas for retrntion
IV. type of supplied teeth
V. major connector
the correct answer is
a. I, II, III
b. I, II, IV
c. I, III
d. II, IV
e. II, IV, V
```
b
182
Which of the following conditions is a fixed partial denture could cause porcelain bonded to metal to LOOSEN ?
I. Removal of 0.7 mm of bulk from the facial surface of the abutment tooth
II. contamination of the metal framework
III. baking the facing to rapidly
IV. insufficient mechanical locks
the correct answer is
a. I, II
b. I,II, III
c. II, III
d. II, III, IV
e. IV only
a
183
```
Which of the following are valid for paralleling proximal walls in porcelain jacket crown preparations ? To
I. obtain maximal retention
II. obtained maximal support for the porcelain against the occlusal surface forces they III. make the proximal amounts of porcelain approximately equal at
the correct answer is
A. I, II
B. I, III
C. II, III
D. all of the above
E. none of the above
```
d
184
Oral examination of an a dentist patient should include digital palpation as well as visual examination because
I. the arch form is more accurately evaluated
II. the thickness of the mikasa can better be evaluated
III. undercut areas may be better evaluated
IV. spicules under the mucosa may be better evaluated
V. the ridge relationship may be better evaluated
the correct answer is
a. I, II, III
b. I, III, IV
c. II, III, IV
d. IV, V
e. all of the above
c
185
A 25 year old patient presents with one missing maxillary incisor extremely version of the remaining maxillary central incisor and a history of having worn FLIPPER- TYPE removable appliance for 10 years there are no other missing teeth . A class 1 interarch relationship exists which of the following is indicated to achieve optimum aesthetics and function ?
a. Extract a malposed central incisor and place a removable appliance
b. Extract the malposed central incisor and place of fixed partial denture
c. reduce the facial of the remaining central incisor maximally and place a fixed partial denture
d. orthodontic position the remaining maxillary central incisor and place a fixed partial denture
e. none of the above
d.
186
What is the effect of drying the prepared tooth with alcohol and warm air rather than wipping it dry before cementation of a crown?
a. possibilities of pulp damage are decreased
b. possibilities of pulp damage are increased
c. the set cement has increased crushing strength
d. the cement sets more rapidly
e. none of the above
b
187
For mandibular denture impression action of which of the following muscles determines the form of the lingual plants lance flange in the molar region ?
a. mylohyoid
b. geniohyoid
c. medial pterygoid
d. lateral pterygoids
e. superior pharyngeal constrictor
a.
188
The probable cause of a sore throat following insertion of a removable partial denture is that
a. the lingual bar is impinging upon the lingual frenum
b. the lingual flange of the partial denture is overextended
c. insufficient relief has been provided for the lingual bar
d. the disto facial flange is overextended
e. none of the above
b
189
The part of the distal-extension removable partial denture which provides the GREATEST resistance two movement and torquing of the abutment teeth is the
a. rest
b. base
c. guiding plane
d. retentive clasp
e. minor connector
b
190
In selecting a shade for a metal ceramic restoration
a. it is better to select a shade with too low a valued and too high if staining is to be used to improve the match
b. it is better to select a shade with too high a value than to low a value if staining is not to be used to improve the match
c. the basic shade selected should be that of the middle third of the tooth to be match
d. none of the above
e. any of the above
d
191
The PRIMARY consideration for full coverage of abutment teeth to be used in the construction of a fixed partial denture is the
a. health of the mucous membrane
b. health of the gingival tissue
c. amount of supporting bone remaining
d. caries susceptibility of the patient
e. none of the above
d
192
The two PRIMARY easons for obtaining the MOST extensive area coverage for a mandibular complete denture are to
a. increase the capacity of underlying structures to withstand the stress due to biting force and to increase the effectiveness of the seal
b. increase the capacity of underlying structures to withstand the stress due to biting force and to improve appearance
c. provide balanced occlusion and to increased tongue space
d. improve retention and to increase tongue space
e. increase tongue space and to improve appearance
a
193
The setting time of zinc phosphate cement can be retarded by
a. diluting the liquid with a small amount of water
b. accelerating the rate of addition of powder to liquid
c. increasing the ratio of powder to liquid
d. decreasing the rate of addition of powder to liquid
e. none of the above
d.
194
Grinding the incisor edges of mandibular anterior teeth to correct protrusive interferences alters the guidance or the contact in
a. working movement
b. balancing movement
c. protrusive movement
d. centric occlusion
e. all of the above
e.
195
The MOST frequent site of squamous cell carcinoma of the tongue is the
a. apex
b. base
c. dorsum
d. lateral surface
e. none of the above
d.
196
The BEST impression technique for call recording loose maxillary anterior hyperplastic tissue in an edentulous patient involves
a. registering the tissue in its passive position
b. using high fusing modeling compound
c. closed mouth technique
d. maximum pressure
e. registering the tissue in its active position
a.
197
Excessive vertical dimension may result in
a. a loss of muscle tone
b. poor denture retention
c. a drooping of the corners of the mouth
d. creases and wrinkles in the region of the mouth
e. excessive trauma to the underlying supporting tissues
e.
198
In order to obtain GREATEST a currency accuracy of dies a polysulfide impression of prepared abutment teeth is taken directly with
a. as much bulk of impression material between the tree and the teeth as possible
b. a tray which has been formed from a previous made cast of patients
c. the smallest possible bulk of impression material
d. a stack tray
e. any of the above
b.
199
When two missing adjacent teeth are placed with a fixed partial denture the connectors usually should be
a. non-rigid at the distal retainer and rigid at the mesial retainer mesial
b. rigid at both the distal and the mesial retainers c. non-rigid at both the distal and mesial retainers
d. rigid at both the distal and the mesial retainers with a non rigid connector between two of the pontics
e. rigid at the distal retainer and non rigid at the mesial retainer
b.
200
esthetic results attainable in a treatment plan involving malposed and diastema can be determined by
a. the patient's attitude
b. an occlusal analysis
c. alveolar bone support
d. periodontal involvement
e. proper use of diagnostic cast
e.
201
The USUAL reason for including a semi-rigid connector in the fixed partial denture design is to
a. improve aesthetics by providing for a simple restoration to be used on the more anterior abutment
b. provide for limited individual movement of abutment teeth in a long span serial fix splinting c. avoid stimulus simultaneous preparation of the abutment teeth 3 unit fixed partial denture
d. reconcile alignment of parallel abutment teeth without excessive reduction
e. reduced working forces on the abutment teeth
d.
202
A two stage impression technique may be used for partial denture construction PRIMARILY because it allows
a. for a more accurate impression of the abutment teeth
b. for a more detailed impression of the soft tissue
c. for resilient and non resilient tissue involved
d. the dentist to border mold
e. none of the above
c.
203
A protrusive interocclusal record is employed to
a. register the condylar inclination
b. determine the amount of bennett movement
c. remount finished dentures on the articulator to balance occlusion
d. determine the degree of protrusive movement of which the patient is capable
e. all of the above
a.
204
Two of the MOST common causes for complete dentures to click are
a. reduce vertical dimension and improperly balance occlusion
b. excessive vertical dimension and poor denture retention
c. use of too large a posterior tooth and two little horizontal overlap
d. improper relation of teeth to the ridge and excessive anterior vertical overlap e. reduce vertical dimension and poor denture retention
b.
205
For BEST results when using an elastic impression material the prepared tooth should be
a. very dry
b. free of surface moisture
c. covered thinly with a water soluble lubricant
d. covered with a surface tension reducing agent and air-dried
e. rinse with water
b.
206
After partial denture are processed and before removing them from the master cast possible errors in occlusion should be checked by
a. remounting the dentures on an articulator using the previous mounting
b. Remoting the dentures on an articulator after registering a new centric relation
c. having the patient use an abrasive paste in his mouth
d. checking cuspal interference in the mouth using articulating paper
e. either c or d
a.
207
Repeated fracturing of a person facing results primary from
a. traumatic occlusion
b. improper mouth hygiene
c. improper selection of a pontic
d. excessive occlusion on the pontic casting
e. an inadequately design panti casting
e.
208
An ADVANTAGE of polysulfide impression material over reversible hydrocolloid material is that poly sulfide impression material
a. will displace soft tissue
b. requires less armamentarium
c. is significantly more accurate
d. is more accurate if saliva mucus or blood is present
e. none of the above
b.
209
The MOST effective means of limiting applied loads to abutment teeth in a distal extension partial denture is by
a. using a stress breaker
b. using acrylic replacement teeth
c. splinting abutments two adjacent teeth
d. using the abutment teeth without splinting
e. maintaining a stable based tissue relationship
e.
210
The occlusal vertical dimension is
a. usually 2-5 mm in a vertical direction
b. maxillomandibular relationship is a vertical direction that include the physiologic rest position
c. maxillo-mandibular relations in a vertical direction when the teeth are in contact
d. the interarch distance that determines the maxillo-mandibular space
e. usually 5 to 10 mm in a vertical direction
c.
211
A patient is missing a mandibular first molar . The maxillary molar has extruded approximately 2.8 mm into the space. Periodontal health is acceptable. Restoring satisfactory occlusion with a fixed partial denture will require a. extraction of the maxillary molar
b. reducing and restoring the maxillary molar to a normal occlusion plane
c. reducing and polishing the maxillary molar to a normal occlusal plane
d. reducing the maxillary molar to a normal occlusal plane
e. none of the above
b.
212
Position and movement of the articular disc are controlled by attachment to the capsular ligament and anteriorly by the fibers of the
a. spheno-mandibular ligament
b. inferior head of the lateral pterygoid
c. superior head of the lateral pterygoid
d. temporomandibular ligament
e. none of the above
c.
213
centric relation is a _____ relstionship
a. tooth-to-tooth
b. mandiblr to condyle
c. mandible -to-skull
d. maxilla-to-skull
e. none of the above
c.
214
All other conditions being normal the IDEAL for posterior pontic is constructed of
a. gold and entirely
b. Gold with a resin facial surface
c. gold with a fused porcelain facial surface surface
d. porcelain on the occlusal surface and gold approximating the ridge
e. gold on the occlusal surface and glazed porcelain approximating the mucosa
e.
215
The MOST important point to the observed in making a hydrocolloid impression for removable partial denture is to
a. position the patient upright to prevent gagging
b. maintain uniform pressure on the tray in the premolar area
c. allow ample time for gelation before muscle molding the borders d. select a tray to provide adequate thickness of hydrocolloid to avoid tearing in areas of severe undercut
e. use a straight steady pull in removal from the mouth does following the long axis of those teeth having the greatest undercut
d.
216
The incisal guidance on the articulator is the
a. mechanical equivalent of horizontal and vertical overlap
b. mechanical equivalent of compensating curve
c. same as the condylar guidance
d. horizontal guidance
e. none of the above
a.
217
Working interferences USUALLY occurs on
a. mesial inclines of maxillary teeth and distal inclines of mandibular teeth
b. distal inclines of maxillary teeth and mesial inclines of mandibular teeth
c. lingual incline of maxillary facial cusps and facial inclines of mandibular lingual casts
d. facial inclines of maxillary lingual cusps and lingual inclines of mandibular facial cusps
e. facial inclines of maxillary facial cusps and lingual inclines of mandibular lingual cast
c.
218
Some dentist use canine guidance at the key to establishing functional occlusion in partial dentures on the theory that canine teeth
a. serve to guide the mandible during eccentric movements and transmit periodontal proprioceptive impulses to the muscles of mastication b. guide the mandible from eccentric movement and thus, the serve as the best single guide to through centric relation
c. prevent trauma to other natural teeth without restoring to extensive equilibrium
d. can be equated easily and are the least subject to pull pulpal injury none of the above
a.
219
A patient complains of looseness with a new removable denture. This is PROBABLY due to a. insufficient facial overlap on posterior teeth
b. passive clasps pressure on abutment teeth
c. deflective occlusal contacts
d. thin flanges on acrylic bases
e. any of the above
c.
220
In denture construction the patient is likely to experience the most discomfort from
a. non anatomic teeth
b. excessive vertical opening
c. a slight error in centric occlusion
d. having the vertical dimension close more than normal
e. having the vertical dimension closed less than normal
b.
221
Decrease vertical dimension of occlusion refers to an
a. vertical dimension that leaves the teeth in a cleanched, close relation in normal position
b. occluding vertical dimension that results in an excessive interocclusal distance when the mandible is in rest position
c. Insufficient amount of interarch distance because of heavy bony ridges
d. condition in which the patient cannot open the mandible because of temporomandibular joint pathosis
e. none of the above
b.
222
A tooth which has not been in function and is now being used as an abutment for become symptomatic. This MOST likely results from
a. overstress
b. pulpol reaction
c. localize osteoclastic activity
d. change in trabecular pattern
e. reaction within the periodontal ligament
e.
223
The posterior palatal bar should be placed in a relationship
a. to incorporate the hamular notch on its side
b. which is anterior to the junction of the movable and immovable soft palate
c. which is posterior to the junction of the movable removable soft palate
d. extending from one to the other hamular notch across the fovea palatinae
e. none of the above
b.
224
The only method by which the hinge axis can be accurately located is by
a. palpation with the condyles in their most retruded, unstrained position in the glenoid fossa
b. measuring 11mm from the tragus to the tragus- ala line
c. Using a face bag with fully adjustable condylar rods
d. Measuring approximately 1.5 inch from the tragus on the tragal-canthus line
e. measuring approximately 15 mm from the tragus on the ala-tragus line
c.
225
A balanced occlusion can MOST frequently be established with a ______ partial denture against a ____.
a. mandibular ; natural dentition
b. mandibular ; complete dentition
c. maxillary ; natural condition
d. maxillary ; complete dentition
e. none of the above
b.
226
Splinting adjacent abutment teeth in a fixed partial denture is performed PRIMARILY to
a. improve distribution of the occlusal load
b. augment retention of the fixed partial denture
c. improve embrasure contours does enhancing gingival health
d. stabilize abutment teeth does provide preventing rotational movement of the distal migration
e. improve mesio-distal spacing of the abutment teeth and pontics for optimum aesthetics and function
a.
227
the GREATEST potential for where exists between
a. tooth and gold
b. tooth and tooth
c. porcelain and tooth
d. porcelain and porcelain
e. gold and gold
c.
228
Failure of partial dentures due to poor class design can BEST be avoided by
a. Using stress breakers
b. using bar type class
c. using intra coronal attachment
d. altering tooth contours
e. clasping only those teeth with fairly long crowns and normal bone support
d.
229
The usual cause of contacting or clicking of posterior teeth when a patient speaks is
a. decrease vertical dimension of occlusion
b. increase vertical dimension of occlusion
c. posterior teeth set to far lingually
d. posterior teeth set too far facially
e. damage enamel
b.
230
Repeated fracture of a porcelain fused to metal restoration is due PRIMARILY to
a. occlusal trauma
b. improper firing schedule
c. failure to use a metal conditioner
d. an inadequately design framework
e. infection
d.
231
The type of load on teeth that is MOST destructive to the periodontium is the
a. vertical
b. oblique
c. horizontal
d. lateral
e. medial
c.
232
In lateral movements the non working condyle moves in which direction
a. out, back and up
b. up, back and down
c. down forwardand medially
d. down, forward and laterally
e. none of the above
c.
233
The MOST likely tissue reaction to gross overextension of a complete denture that has been worn for a long time is
a. epulis fissuratum
b. pyogenic granuloma
c. papillary hyperplasia
d. giant cell reparative granuloma
e. papillary carcinoma
a.
234
The relationship of denture base to bone that resists dislodgement of the denture is an horizontal direction is
a. support
b. pressure
c. esthetics
d. stability
e. none of the above
d.
235
In designing retainer on a non cars mandibular first premolar abutment with a short clinical crown a restoration is MOST appropriate
a. inlay
b. full crown
c. MOD onlay
d. reverse 3/4 crown
e. reverse 1/4 crown
b.
236
Porosity in a heat activated acrylic resin denture base is most frequently caused by
a. heating the case to slowly
b. packing during the doughy-stage
c. processing for 9 hours at 160 degrees fahrenheit
d. lack of pressure on the recinos mass
e. excess pressure on the recinos mass
d.
237
Elongated grains in the microstructure of a wrought wire indicates that it has been
a. Cold work
b. recrystallized
c. stress relief annealed
d. hardened by heat treatment
e. rusted due to oxidation
a.
238
A denture set-up was balance on the articulator with the condylar setting at 20° this setting was incorrectly recorded when the correct setting of 45° is made on the articulator if a balanced occlusion is desired it will be necessary to
a. decrease the plane of occlusion
b. increase incisal guidance
c. decrease the height of cusps
d. increase compensating curve
e. decrease compensating curve
d.
239
in removable partial denture design guiding planes served to
a. aid in balancing occlusion
b. assure predictable class retention
c. form right angles to the occlusal plane
d. meliminate the necessity for precision attachment e. eliminate the necessity for a back action clasp
b.
240
When the path of dislodgement is not controlled and rotational dislodgement of extension bases occurs remotely located vertical metal stops place in prepared seats can be used to enhance the effectiveness of retentive class. The vertical metal stops are
a. indirect clasps
b. remote retainers
c. indirect retainers
d. forward retainers
e. passive retainers
c.
241
Excessive vertical dimension of occlusion may result in
a. poor denture retention
b. increase interocclusal distance
c. droopingof the corners of the mouth
d. creases and wrinkles around the lip
e. trauma to the underlined supporting tissues
e.
242
Major connectors of a maxillary removable partial denture maybe be beaded to
a. Produce a stronger stronger framework
b. aid in retention of the removable partial denture
c. hold acrylic resin to the metal framework
d. produce a positive contact with the tissue
e. form a finish line between the metal and acrylic resin
d.
243
A patient who wears complete dentures is having trouble pronouncing the letter "t". this os PROBABLY caused by
a. To thick a palatal seal area
b. too thick a base in the mandibular denture
c. Incorrect positioning of maxillary incisor
d. improper positioning of mandibular incisors
e. none of the above
c.
244
The distolingual extension of the mandibular impression for a complete denture is limited by the action of the ____muscle .
a. stylohyoid
b. medial pterygoid
c. lateral pterygoid
d. superior constrictor
e. ciliary
d.
245
When a removable partial denture is completely seated the retentive terminals of the retentive clasp arm should be
a. passive and applying no pressure on the teeth
b. contacting the abutment teeth only in the suprabulge areas
c. Resting lightly on the height of contour line on the abutment teeth
d. applying a definite positive force on the abutment teeth in order to prevent dislodgement of the removable partial denture
e. All of the above
a.
246
For the BEST results when using an elastomeric impression material the prepared tooth should be
a. very dry
b. free of surface moisture
c. covered thinly with at water soluble lubricant
d. covered with a surface tension reducing agent and air-dried
e. formented with hot compresses
b.
247
At the wax try in the maxillary plane appears to be correct yet when the patient closes lightly in centric relation the mandibular teeth appear to show too much the patient lips do not contact unless the patient forces them to do so.
The error that has MOST likely occurred is
a. Inaccurate facebow transfer
b. excessive amount of freeway space
c. excessive vertical dimension of occlusion
d. over close vertical dimension of occlusion
e. decrease vertical dimension of occlusion
c.
248
The setting time of zinc phosphate cement can be retarded by
a. increasing the ratio of powder to liquid
b. diluting the liquid with a small amount of water
c. accelerating the rate of addition of powder to liquid
d. decreasing the rate of addition of powder to liquid
e. increasing the amount of both the liquid and water
d.
249
Chroma is that aspect of color that indicates
a. degree of translucency
b. degree of saturation of the hue
c. combined effect of the hue and value
d. all of the above
e. none of the above
b.
250
Proper lip support for a patient with a complete dentures is provided PRIMARILY by
a. convex surface of the labial flange
b. Rounded contours of the inter dental papilla
c. proper pronouncement of sibilant sound
d. thickness of the border in the vestibule
e. facial surfaces of teeth and simulated attached gingiva
e.
251
When establishing balance occlusion lingual cusp of maxillary posterior teeth on the non-working side should contact the _____ of mandibular posterior teeth.
a. Facial inclines of lingual cusps
b. lingual inclines of lingual cusps
c. lingual inclines of facial cusps
d. central fossa
e. facial inclines of distal cusps
c
252
An advantage of a wide thin palatal bar strap compared with an arrow bar is that the wide bar a. is more stable
b. is easier to polish
c. can be rigid with less bulk
d. is less irritating to the soft tissue
e. can be more flexible
c.
253
When a cusps is in deflective occlusal contact in centric relation but does not contact in one or more of the eccentric movement grinding should be performed on
a. Both the cast and opposing area
b. the opposing fossa or the marginal ridge
c. opposing areas in eccentric position
d. the cast that is in deflective occlusal contact e. all of the above
b
254
A crown casting with a chamfer margin fits the die. In the mouth the casting is open approximately 0.3 mm. A satisfactory fit and an accurate physiologic contour of the gingival area of the crown can BEST be achieved by
a. Hand burnishing
b. mechanical burnishing
c. using finishing burs and points to remove the enaml margins on the tooth
d. making a new impression and remaking the crown
e. Relieving the inside of the occlusal surface of the casting to allow for further seating
d.
255
Which of the following muscles originates from the zygomatic process of the maxilla
a. middle temporal
b. lateral pterygoid
c. superficial layer of the masseter
d. posterior proportion of the buccinator
e. medial pterygoid
c.
256
In determining the posterior limit of the maxillary denture base, which of the following is on the posterior border?
a. Hamular notch
b. hamular process
c. fovea palatini
d. vibrating line
e. pterygomandibular raphe
a.
257
Using a thinner mix of a gypsum- bonded that investment will
a. Produce a smoother casting
b. increase setting expansion
c. decrease setting expansion
d. increase thermal expansion
e. decreased thermal expansion
c.
258
Which of the following materials will produce the MOST rigid restoration for frameworks of the same dimension?
a. wrought gold
b. palladium alloys
c. cobalt chromium alloys
d. partial denture casting gold in the hardened condition
e. nickel-cadmium alloys
c.
259
Which of the following is likely to occur under the distal extension maxillary partial denture of a patient with Paget's Disease?
a. The bone will tend to expand and the partial denture will have to be made periodically
b. The bone is like "cotton wool" and will be resorbed rapidly,thus making frequent rebasing necessary
c. The bone will become very dense and hard thus, soreness of the basal seat is likely to occur
d. nothing will occur because maxillary bone is not usually affected
e. the bone will tend to contract and the partial denture will have to be remade
a.
260
non-working interferences GENERALLY occur on inner aspects of the ______ cusps of ______.
a. facial; macillary molars
b. facial ; mandibular molars
c. lingual ; mandibular molars
d. facial; maxillary premolars
e. distal ; mandibular premolars
b.
261
The fascio- lingual dimension of the occlusal portion of a hygienic pontic is PRIMARILY determined by the
a. Length of of the pontic
b. masticatory force of the patient
c. width and crestal position of the edentulous ridge
d. facio-lingual position of opposing centric holding contact areas
e. mesio-lingual position of opposing centric holding contact areas
d.
262
Which of the following will increase retention of a complete denture
a. xerostomia
b. air chamber in mid palate
c. foreshortened denture bases
d. increase salivary film thickness
e. accurate adaptation of the denture base to the mucosa
e.
263
The treatment of choice for a patient with a maxillary complete denture with severe bilateral tuberosity undercuts is to
a. remove both tuberosity and undercuts
b. reduce the tissue bilaterally
c. reduced the tissue on one side only, if possible
d. install an additional orthodontic appliance
e. none of the above
c.
264
Translation is a mandibular opening movement of occurs
a. On closing from centric relation
b. on initial opening from centric relation
c. In the upper compartment of the temporomandibular joint
d. In the lower compartment of the temporomandibular joint
e. on opening from centric relation
c.
265
During post insertion adjustment errors in occlusion maybe check MOST accurately by
a. Having the patient leave the dentures out of the mouth for 24 hours
b. Directing the patient to close the jaws bring the teeth into occlusion
c. Having the patient close in occlusion and making a transfer record to the articulator
d. Remount in the dentures on the articulator using remount casts and new interiorocclusal records
e. Radiographic examination
d.
266
Which of the following is a MAJOR disadvantage to immediate complete denture therapy?
a. Trauma to extraction sites
b. Increased potential for infection
c. Impossibility for an anterior try in
d. Excessive resorption of residual ridges
e. Minimal resorption of residual ridges
c.
267
Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixture?
a. Excessive expansion
b. excessive shrinkage
c. low impact strength
d. excessive brittleness
e. high impact strength
b.
268
Jaw relations for an edentulousl patient have been established. The maxillary cast has been mounted on an articulator without a face-bow transfer. It is decided to increase the occlusal vertical dimension by 4 mm. This will necessitate
a. Opening the articulator 4 mm
b. a new centric relation record
c. a change in condylar guide setting
d. an increase in the rest vertical dimension
e. a decrease in the rest vertical dimension
b.
269
Indirect retention is designed to
a. Stabilize tooth-borne removable partial denture
b. Engage an undercut area of an abutment tooth
c. Help resist tissue ward movement of an extension base partial denture
d. Help resist dislodgement of an extension based partial denture in an occlusal direction
e. Remount and overextension based partial denture
d.
270
In a canine-protected occlusion which prepared tooth CANNOT be evaluated for adequate clearance bilateral excursions of the mandible?
a. Maxillary canine
b. maxillary first molar
c. maxillary first premolar
d. mandibular second molar
e. mandibular second premolar
a
271
Protrusive jaw relation records are used to
a. give direction to the occlusal plane
b. set the incisal guides of the articulator
c. set the lateral post of the articulator
d. set the container inclinations of the articulator
e. change the condylar guide settings
d
272
When the posterior maxillary buccal space is entirely filled with the denture flange, interference may occur with movement of the
a. Masseter muscle
b. coronoid process
c. condyloid process
d. zygomatic process
e. pterygoids muscle
b.
273
Under which of the following conditions is it MOST important to mount a patient's cast on the hinge axis?
a. The patient has a severe class to occlusal relation
b. Several fixed partial dentures need to be constructed
c. A change in vertical dimension through restoration is planned
d. Dentures with high cusps teeth are to be fabricated on a fully adjusted articulator
e. The patient has poor denture retention
c.
274
If a deflective occlusal contacts is in centric relation between the facial cusps of a mandibular molar and the fossa of the maxillary molar of a complete denture, the FIRST step toward eliminating the interferences should be to
a. Reduce the cusps of the mandibular molar
b. Depend the fossa of the maxillary molar
c. Check the interference in centric and all eccentric occlusions
d. reduce the cusps of the mandibular molar and depend the fossa of maxillary molar
e. Increase the cusps of the mandibular molar and deepen the fossa of the maxillary molar
c.
275
After the maxillary cast has been correctly mounted on the articulator the functionaly correct relation of the mandibular cast to the maxillary cast may be established by using
a. An index made in centric relation but short of tooth contact
b. Cusps and sulci of the remaining teeth as guides for relating the mandibular cast to the maxillary cast
c. A wax index in which the patient has brought the mandibular teeth into a maximal contact with the opposing teeth
d. . A wax index into which of the patient has closed from the postural rest position just penetrating the wax to to contact
e. none of the above
a.
276
A patient complains of looseness with a new bilateral distal extension removable partial denture this is probably caused by
a. deflective occlusal contacts
b. thin flanges on acrylic bases
c. passive clasp ressure on abutment teeth
d. insufficient facial overlap on posterior teeth
e. excessive facial overlap on anterior teeth
A.
277
When the mandible is in its physiologic rest position the distance between occluding surface of maxillary and mandibular teeth or occlusion rims is
a. centric occlusion
b. vertical dimension
c. interocclusal distance
d. vertical dimension of rest
e. occlusal plane
c
278
The error that MOST frequently contributes to poor aesthetics of denture is the practice of placing maxillary anterior teeth
a. Following the smile line
b. too far below the lip line
directly over the a edentulos ridge
d. too far to the facial of the a edentulousl ridge
e. too far to the lingual of the a edentulousl ridge
c.
279
The patient's natural maxillary anterior teeth have drifted and are elongated. The patient desires cosmetics correction which of the following is the MOST important aspect of this correction?
a. Arrange the teeth for phonetic clarity
b. set the teeth so no bony surgery is involved
c. decide on the correct vertical dimension imposed by the change of the interior arrangement
d. decide on the changes to be made and communicate clearly with the patient on the intended changes
e. prepare the tooth sockets on the cast because it is different from a conventional case
d.
280
Which of the following procedures produces an UNSATISFACTORY arrangement of artificial teeth for complete dentures?
a. Setting posterior teeth to occlude in a line of compromise between the ridges
b. Setting maxillary and mandibular anterior teeth so that they contact in centric relation
c. Rotating anterior teeth to make the arch appear narrow
d. Establishing the occlusal plane to favor the arch that will withstand the least amount of leverage
e. Establishing the occlusal plane to favor the arch that will withstand the most leverage
b.
281
Overextension of a mandibular impression may be suspected on the labial and buccal if
a. The impression raises when the tip of the tongue is thrust in the cheek
b. The impression raises when the tongue is thrust forward
c. the impression races when the mouth is open
d. A portion of the denture border appears to be uncovered when the tissues are in function
e. all of the above
c.
282
After placing a new complete denture a patient exhibits cheek-biting opposite the molars. The teeth were set in a conventional anatomic relationship.To correct cheek biting the dentist should reduce the ______ molars.
a. Central fossa of maxillary
b. Lingual cusp of maxillary
c. Facial surfaces of mandibular
d. Facial surfaces of maxillary
e. Distal surfaces of maxillary
c.
283
The PRIMARY purpose of a plaster index of the occlusal surfaces of a maxillary denture before removing the denture from the articulator and cusp is to
a. Preserve the face-bow transfer
b. maintain the patient centric relation
c. maintain the patience of vertical dimension
d. maintain both the correct centric and vertical relation records
e. maintain the angle of the occlusal plane
a.
284
Which of the following design characteristics of a partial denture is MOST important to oral health?
a. Bracing
b. support
c. stability
d. retention
e. aesthetics
b.
285
In aesthetics the value of a denture tooth depends a upon the
a. density of the hue
b. intensity of the color
c. metamerism of the basic color
d. relative lightness or blackness of its colors
e. tensile strength of the denture
d.
286
Which of the following masticatory muscles are MOST responsible for positioning and translating the condyles?
a. Temporal
b. masseter
c. lateral pterygoid
d. medial pterygoid
e. middle temporal
c.
287
Tooth borne removable partial dentures should normally have the rest located
a. Next to edentulous areas
b. A away to a edentulous areas
c. Primarily on molars because they are the strongest teeth
d. on as few teeth as feasible in order to preserve as many teeth as possible
e. On as many teeth as possible in order to enhance cosmetic appeal
a.
288
```
Arrange the following steps for clinical trial insertion and adjustment of a fixed partial denture in order in which they should be performed
I. check margins
II. check centric contacts
III.adjust functional contact
IV. adjust proximal contacts and pontic tips
the correct answer is
a. I, II, IV, III
b. I, IV, II, III
c. II, I, III, IV
d. IV, I, II, III
e. III, I, IV, II
```
d.
289
The advantage of using an intra coronal attachment rather than an extra coronal attachment for a removable partial denture are that the intraconal attachment
I. Is easy to repair
II. does not require a prepared abutment and casting
III. adapts well to short clinical crowns
IV. eliminates the visible retentive component
V. has vertical support through a rest sit located more favorably in relation to the horizontal axis of abutment teeth
the correct answer
a. I, III
b. I, V
c. II, III
d. II, IV
e. IV, V
e.
290
Prior to constructing a complete maxillary denture the palatal tori are not routinely removed which of the following exceptions require surgical intervention
I. mark undercuts are present
II. tori are present that impinge on the soft palate
III. An immediate denture is to be constructed IV. a denture containing a metal base is to be constructed
The correct answer is
a. I, II
b. I, III
c. I, IV
d. II, III
e. II,IV
a.
291
```
In the metal ceramic technique heating the metal structure in a furnace prior to application of porcelain is necessary to
I. Raise the proportional limit of the metal
II. Oxidized trace elements in the metal
III. Eliminate oxidation
The correct answer is
a. I only
b. I, II
c. I, III
d. II only
e. II, III
```
d.
292
```
Factors that strongly influence the mechanical properties of denture base made from acrylic resins include
I. size of powder particles
II. quantity of the polymer tested
III. molecular weight of the polymer
IV. degree of crosslinking
V. composition of monomers used to prepare the polymer the correct answer is
a. I, II, III
b. I, II, IV
c. I, III, V
d. II, IV, V
e. III, IV, V
```
e.
293
```
Support for a complete maxillary denture is ultimately derived from which of the following pairs of bones?
I. Maxillary
II. mandibular
III. palatine
IV.coronoid
V. temporal
The correct answer is
a. I, II
b. I, III
c. I, IV
d. I, V
e. II, III
```
b
294
```
In casting the metal structure of a metal ceramic restoration it is usually necessary to use a
I. gas air torch
II. gypsum bonded investment
III. phosphate bonded investment
IV crucible that has not been used for other alloys
the correct answer is
a. I, II
b. I, III
c. II, IV
d. III ONLY
e. III, IV
```
e.
295
Compared to a conventional complete denture the advantages of an overdenture are that is
I. Reduces bone resorption
II. Maintain some proprioception
III. Involves a less demanding impression technique
IV. Makes placement of artificial teeth easier
the correct answer is
a. I, II
b. I, III
c. II, III
d. II, IV
e. III, IV
a.
296
A facebow transfer record allows the dentist to
I. Locate the hinge axis
II. Record centric relation more reliably
III. Position the maxillary cast properly in relation to the mandibular cast
IV.Transfer the cast to the articulator maintaining the proper interocclusal relationships that are present in the mouth
The correct answer is
a. I, III
b. I, IV
c. II, IV
d. II, III
e. none of the above
E
297
```
Causes for fracture of a cobalt chromium removable partial denture alloy include
I. Work hardening
II. Pitting corrosion
III. Shrinkage porosity
IV. Rough surface finish
V. Low percent elongation
VI.Excessive carbon in the alloy
the correct answer is
a. I, II, III, VI
b. I, II, IV, V
c. I, III, V, VI
d. II, III, IV, VI
e. II, IV, V, VI
```
c.
298
```
When is establishing the plane of orientation, the occlusal portion of the maxillary occlusal rim is parallel to the
I.
II.
III.
IV.
V.
the correct answer is
a. I, III
b. I, IV
c. I, V
d. II, IV
e. III, IV
```
d.
299
```
Which of the following principles should be considered in constructing complete denture for a patient with a debilitating disease?
I. Maximum extension
II. Narrow occlusal table
III. Non-pressure impression technique
IV. Porcelain opposing plastic teeth
the correct answer is
a. I, II, III
b. I, II, IV
c. II, III
d. III, IV
e. I, II, III, IV
```
a.
300
```
Increasing the water powder ratio when mixing gypsum materials will
I. Weeken the set material
II. Increase the setting time
III. Decrease the setting time
IV. Increase the setting expansion
V. Decrease the setting in expansion
VI. Increase the porosity of the set material
the correct answer is
a. I, II, IV
b. I, II, V, VI
c. II, V, VI
d. III, V, VI
e. III, V
```
b.
301
The lateral pterygoid muscle functions to
I. Elevate the mandible
II. Protrude the mandible
III. lift the mandible from the pterygoid plate
IV. Move the mandible to the opposite side
the correct answer is
a. I, II
b. I, III
c. I, IV
d. II, III
e. II, IV
e.
302
```
To maintain and protect the health of the gingival tissues correct contour of a crown is important in which of the following areas
I.middle third
II. infra bulge or gingival third
III. height of contour of supra bulge
IV. interproximal gingival areas
the correct answer is
a. I, II
b. I, III, IV
c. II ONLY
d. II, IV
e. III, IV
```
d
303
In which of the following ways do surface characteristics of porcelain affect the perceive form of the final restoration?
I. A surface smoother than normal will give the impression of a larger size
II. Horizontal highlights suggest increase length
III. Vertical highlights give an illusion of weed
IV. Changes in a contour and resulting highlights can be used to alter the apparent long axis inclination of the tooth
the correct answer is
a. I, II, III
b. I, III, IV
c. I, IV
d. III, IV
e. I, II, III, IV
c.
304
The probable etiologic factors of popular a hyperplasia of the soft tissue under a complete denture include which of the following?
I. Trauma from denture wearing
II. Round-the-clock denture wearing
III. Lack of non working contacts in eccentric job position
IV. Natural mandibular anterior teeth opposing complete maxillary denture
V. Hyperplasia around the border of a denture from under extended denture flanges
the corrrct answer is
a. I, II, IV
b. I, III, V
c. II, III, IV
d. III, IV, V
e. I, II, III, IV
a.
305
```
Group function occlusion in a natural dentition is characterized by having
I. canine right rice in protrusion
II. Non working side contact
III. Working contacts from anterior and posterior teeth
IV. Total balance in lateral excursion
V. A long centric from centric relation to centric occlusion
the correct answer is
a. I, II, III
b. I, II, III, V
c. I, III
d. I, IV, V
e. II, III
```
e.
306
Methods of selecting anterior teeth for a denture include
I. Saving extracted teeth
II. Using pre extraction records on photographs
III. Following the lines place on the occlusion rims
the correct answer is
a. I, II
b. I, III
c. II, III
d. I, II, III
e. none of the above
d.
307
A patient who has been wearing a maxillary complete denture and a mandibular bilateral distal extension removable partial denture for five years without maintenance may show
I. Decreased vertical dimension of occlusion
II. Decrease interocclusal distance
III. A prognathic facial appearance
IV. Premature proxim contacts in centric relation
the correct answer is
a. I, II
b. I, III
c. I, IV
d. II, III
e. II, IV
b.
308
```
the retentive characteristics of a full crown may be enhanced by
I. Using glass ionomer cement
II. Using zinc phosphate cement
III. Adding pinholes in the preparation
IV. Adding groups parallel to the path of draw
V. Maximizing the parallelism of the axial wall
the correct answer is
a. I, III, IV
b. I, IV, V
c. II, III, IV
d. II, III, V
e. II, IV, V
```
e.
309
```
Which of the following might be anticipated in a patient who is an uncontrolled diabetic.
I. Impaired healing
II. poor tissue tolerance
III. Rapid bone resorption
IV. Increased salivary flow
The correct answer is
a. I, II, III
b. I, II, IV
c. I, III, IV
d. II, III, IV
e. I, II, III, IV
```
a.
310
Removable partial dentures differ from complete dentures in that
I. Protrusive balance is unnecessary for distal extension removable partial dentures
II. Vertical relation for removable partial dentures is usually determined by remaining natural teeth
III. Bilateral balance is a prime necessity for removable partial denture stability
IV. Gaspeed guidance should be eliminated if it all possible in the partially edentulous situation
the correct answer is
a. I, II
b. I, IV
c. II, III
d. II, IV
e. III, IV
a.
311
```
Staining a porcelain restoration produces which of the following effects?
I. Reduced value
II. Increase value
III. Increased metameric responses
IV.Increase difficulty of glazing the restoration
rhe correct answer is
a. I, III
b. I, IV
c. II,III
d. II, IV
e. III, IV
```
a.
312
When fabricating a custom tray for a final mandibular complete denture impression, a spacer with stops is used to ensure that
I. The tray will be seated in proper relationship to the arch
II. The tray will be seated to allow selective pressure
III. The final impression will not be over extended
IV. There will be adequate room for the impression material
The correct answer is
a. I, III
b. I, IV
c. II, III
d. II, IV
e. III, IV
b.
313
```
Which of the following are important considerations when preparing a removable partial denture apartment to receive crown?
I. Path of draw
II. Location of rest
III. Orientation of guiding planes
IV. Placement of the porcelain metal finish line
the correct answer is
a. I, II, III
b. I, II, IV
c. I, III, IV
d. II, III
e. I, II, III, IV
```
e.
314
```
Which of the following are important considerations when preparing a removable partial denture apartment to receive crown?
I. Path of draw
II. Location of rest
III. Orientation of guiding planes
IV. Placement of the porcelain metal finish line
the correct answer is
a. I, II, III
b. I, II, IV
c. I, III, IV
d. II, III
e. I, II, III, IV
```
e.
315
The porcelain fused to metal framework must NOT be contaminated by handling between which two steps of the overall porcelain application process?
a. Bisque bake and glazing
b. opaque bake and bisque bake
c. heat treatment and opaque bake
d. presoldering and heat treatment
e. first opawue bake and second opaque
c
316
Which of the following is the MAJOR reason for NOT reducing the vertical overlap of anterior teeth in an attempt to reduce incisal guidance in the construction of immediate dentures?
a. The vertical dimension of occlusion would be changed
b. The anterior contact necessary for balance occlusion
c. The posterior cast inclination would be increased and stability decreased
d. The advantage of duplicating the position of natural teeth with artificial teeth would be lost
e. None of the above
d.
317
Each of the following factors positively influence a patient's ability to clean a fixed partial denture EXCEPT?
a. pontic design
b. openness of embrassures
c. occlusion of prosthesis
d. adaptation of the retainer to the finish line
e. none of the above
c.
318
When making a pulley sulfide impression for a cast crown custom trace are usually preferred overstock trays for all of the reasons EXCEPT?
a. Custom trays require less impression material
b. Custom trays facilitate uniform contraction of the impression material
c. Impressions made in custom trays are easier to remove from the mouth
d. Stock tray may be short in the flange area
e. None of the above
c.
319
Running tap water overmaster cast of dental plaster or dental stone should be minimized because the completely set gypsum material is partially soluble in water
a. Both statements and reason are correct and related
b. both statement and reason are correct but NOT related.
c. the statement is correct but the reason is NOT.
d. the statement is NOT correct but the reason is an accurate statement.
e. NEITHER statement nor reason is correct.
a.
320
The adhesive place inside a custom tray should not be allowed to dry before placing the impression material with the tray because the sticky surface of the adhesive will help bond the impression material to the tray.
a. Both statements and reason are correct and related
b. both statement and reason are correct but NOT related.
c. the statement is correct but the reason is NOT.
d. the statement is NOT correct but the reason is an accurate statement.
e. NEITHER statement nor reason is correct.
e.
321
A complete mandibular denture should cover the retro molar pad (pear-shaped pad) because the retro molar pad provides a guide for positioning the occlusal plane.
a. Both statements and reason are correct and related
b. both statement and reason are correct but NOT related.
c. the statement is correct but the reason is NOT.
d. the statement is NOT correct but the reason is an accurate statement.
e. NEITHER statement nor reason is correct.
b.
322
For a provisional restoration to protect in adequately the gingiva, it is essential that external and marginal services be well polished. The temporary cement must also be removed from the gingival crevice.
a. Both statements are TRUE
b. both statements are FALSE
c. the first statement is TRUE, the second is FALSE
d. the first statement is FALSE, the second is TRUE
e. unable to determine
a.
323
The most important consideration in checking custom trays for accurate muscle molding is
a. stability
b. a tight posterior seal
c. stability and lack of displacement
d. a tight peripheral seal disregarding displacement
e. none of the above
c.
324
A broken stress or non rigid type fix bridge is indicated when
a. retainers can be designed to have equal retentive qualities
b. 2 or 3 missing teeth are to be replaced
c. constructing a mandibular fixed partial bridge only
d. fix splinting involves two or three abutment teeth
e. retainers cannot be prepared to draw together with or without excessive reduction
e.
325
When a patient wearing complete denture makes a whistling sound while announcing the "s" sound, it is caused by
a. The anterior teeth being placed too far labially
b. The anterior teeth being placed too far lingually
c. Too great a vertical overlap
d. the palatal vault being too high and narrow
e. none of the above
a.
