Prostho rudman Flashcards
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
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
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
c
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
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
d
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
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
b
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
e
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
e
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
d
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
b
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
b
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
d
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
c
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
e
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
c
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
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
c
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
d
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
c
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
d
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
c
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
an open vertical dimension may ADVERSELY affect
a. retention
b. protrusion
c. centric reltion
d. balanced occlusion
e. interocclusal clearance
e.
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.
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.
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.
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.
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.
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.
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
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.
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.
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.
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.
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.
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
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
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
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.
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.
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
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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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
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.
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.
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.
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.
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.
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
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.
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
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
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
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
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
