Resto Rudman Flashcards
during anoperative procedure, the rubber dam clamp repeatedly dislodges. this maybe caused by I. improper clamp selection II. dullness of the clamp jaws III. clamp improperly positioned IV. hoes punched too closely together on rubber dam V. use of heavy weight rubber dam the correct answer is a. I, III b. I, II, III c. I, III, V d. II, III, IV e. all of the above
a.
in establishing cavity form from class II amalgam, it is IMPORTANT to
I. limit the isthmus width to 1/4 the intercuspal distance whenever possible
II. consider the depth rather than width in order to prevent fracture of the filling material
III. use pins to protect the large amalgam restoration from fracture
IV. have 90 degree junction of tooth and amalgam at the cavosurface are
V have a slight rounding of internal line angles to relieve stress areas in the tooth
the correct answer is
a. I, II, III, IV
b. I, II, III, V
c. I, II, IV, V
d. I, III, IV, V
e. II, III, IV, V
c
Instruments that might logically be used for placing gingival bevels on inlay preparations are I. small diamond disks II. fine, tapered diamond stones III. margin trimmers IV. enamel hatchets V. tapered carbine burs the correct anser is a. I, II, III b. I, III, IV c. I, IV, V d. II, III, V e. II, IV, V
d.
the use of composite resin for class I restorations is generlly recommended because its clinical performance is inferior to amalgam with espect to
a. creep
b. fracture
c. occlusal wear
d. marginal breakdown
e. decay
c.
the use of stainless steel pins in amalgam restorations has become widesprread. it compressive stregnht of the restoration is increased significantly, the increase results
a. from condensation techniques rather than the number of pins used
b. when the number of pins is greater than four
c. because pins markedly increase the compressive strength characteristic of amalgam
d. because pins markedly increase the tensile strength characteristic of amalgam
e. from the strenght of the stainless steel in the pins
a.
in the practic of preventive dentistry, PRIMARY prevention refers to those measures taken to
a. prevent the development of disease in the primary dentition
b. prevent ds before evidence of its occurrence is detected
c. prevent incipient disease from progressing to destructive activity
d. focus priority on those practices which minimize the loss of teeth
e. ensure emphasis on prevention in all dental treatent at any time
b.
occlusal clearance for a porcelain fused to metal restoration should be about ____mm o the occlusal surface of a maxillary first premolar
a. 0.5
b. 1.0
c. 1.5
d. 2.0
e. 2.5
d.
a patient telephned that she broke off a big piece of her upper left back tooth. an emergencyoffice visit between patients revealed that the facial portion of the maxillary second molar was sheared off level with the gingival tissue. a MOD inlay in that tooth was loaase and it was removed. No pulp exposure was evident, but the tooht was sensitive. the patien cannot be seen again for two weeks. the treatment at ths time would be to
a. smooth the rough edges and reappoint
b. place a zinc phosphate cement temporary restoration
c. place a ZOE cement temporary restortion
d. cement on a metal band or shell with reinforced ZOE cement
e. dismiss the pateint without further iintervention until the next scheduled visit ehich eould provide sufficient time for the obviously involve treatment
d.
the factor in the design of the abutment preparation for a partial denture hich must be determined BEFORE initiating treatment of the abutment teeth is the
a. locatio of the rest or clasps
b. numer of teeth to be replaced by the partial denture
c. cusp inclined to be used in selecting the replacement teeth
d. composition of the denture material which is supported by the edentulous areas
e. all of the above
a.
a cavity prepared for a powered gold restoraions on the proximal surface of an anterior tooth ALWAYS
a. includes the contact are
b. extends beneath the creast of the gingival tissue
c. contains a 2- planed lingual wall and a 2- planed facial wall
d. end in the fcial embrasure to facilitate the finishing and maintenace of the margins
e. has enmel walls which meet the surface of the tooth by following the general direction of the enamel rods
e.
the incomplete sating of a die into an interocclusal record will result in
a. excessive occlusal contact of the casting
b. insufficient occlusal contact of thte casting
c. normal occlusal contact if soft wax is used on the occlual
d. distortion of the inteocclusal record
e. no occusal contact
a.
the MOST frequent complaint of pain after placement of an amalgam restoration is related to
a. cold
b. heat
c. swees
d. galvanic shock
d. biting pressure
a.
of the ff materials, the MOST likely to cause an adverse pulpal reaction when placed directly in a deep cavity prepared is
a. silver amalgam
b. silicate cement
c. calcium hydroxide
d. ZOE
e. zinc phosphate cement
b.
cuspal reduction DECREASES
a. retention form
b. resistance form
c. convenience form
d. pulpal invlvement
e. withdraw form
a.
a composite resin, compared with poly (methyl methacrylate) has
a. a lowercoefficient of thermal expansion
b. greatter compressive strength
c. greater stiffness
d. lower polymerization shrinkage
e. all of the above
e.
an endodontically treatedmaxillary central incisor with moderate sized mesial and distal compsite resin restorations involving the facial surface and a heavy occlusion would BEST be trteated by restoring it with
a. post-retained porcelain metal full crown
b. post- retained jacket croown
c. composite resin
d. 3/4 gold crown
e. none of the above
a.
the 8percent racemic epinephrinw- containing cord for tissue packing may prove HAZARDOUS for some patients because of its
. local caustic action upon the gingival tissue
b. vasoconstriction action systemically
c. propensity for allergic response
d. astringent action locally
e. none of the above
b
the location oof the gingival margin in the preparation of proximal cavities is influenced by hte
I. need for retention of a cast restoration
II. amount of gingival recession
III. need to extend gingivally to clear the contact area
IV. convenieve form of the cavity
the correct aswer is
a. I, II
b. I, III
c. II, III
d. II, IV
e. III, IV
b.
functions of the dental pulp include all of the ff EXCEPT
a. support
b. sensory
c. circulatory
d. dentin repair
e. gingivitis
d.
another name for dental plaque is
a. sordes
b. dextran
c. microcosm
d. materia alba
e. polysaccharide
c.
pit and fissure cries is USUALLY characterized by cones of decay that
a. are apex to base at the D-E junction
b. are base to base at the D-E junction
c. are apex to apex at the D-E junction
d. have no general pattern at the D-E junction
e. are unrecognizable
b.
if acidogenic bacteria are to produce caries, it is REQUIRED that they
a. are aerobic
b. produce phosphoric acid
c. colonize on the tooth surface
d. grow and reproduce in acid environment
e. reproduce on the tooth surface
c.
inflammation of the pulp is MOST often associsted with
a. trauma
b. galvanism
c. occlusion
d. dental caries
e. gingivitis
d.
an expanded function dental auxillary has demonstrated to you tht he can regularly complete a prcedure at an acceptable quality level. unless specifically requested to aid in a procedure , you should.
a. contine to evaluate all tretment rendered by the auxillary
b. occasionally spot evaluate procedures as a quality control
c. evaluate each patient only after total patient treatment has been completed
d. occasionally spot evaluate pateints only after total patient treatment has been comleted
e. evluate the treatment rendered at the net recall appointment in order to benefit fully from the service of an expanded - function auzillary
a.
the generl direction of th enamel rods at any particular locatio on the crown of a permnent tooth maybe the MOST accurately described to be
a. perpndicular to the pulp surface
b. parallel to the dentin tubules
c. perpendicular to the dentini-enamel jnction
d. perpendiculr to a tangent at the external surface of the enamel
e. perpendicular to the dentin tubules
d.
in restoring the distal surface of mandibular first molar, how should the distal marginal ridge be restored in relation to the mesial marginal ridge of mandibular second molar provided the maxillary molars are ideally shaped and aligned?
a. lower
b. higher
c. same height
d. marginal ridge are urelated
c
a split tooth wil frequently display which of the ff symptms and signs? I. no radiographic evidence II. moderate pain, transient in nture III. sensitivity to pressure IV. thermal sensitivity the corrrect answer is a. I,II b. II, III c. III, IV d. II, III, IV e. all of the above
e.
a 3/4 crown cating is made fpor the mandibular left second premolar. it does not sit upon the die completely and appears open at all margins. which of the ff could cause this problem?
a. a suck-back or void on the inner surface of the casting a the sprue are
b. a bubble in the die at the lingual cusp aread due to entrpment o fir while pouring stone into the impressions
c. investment incompletely removed from the casting
IV. a bubble of gold on the casting
V. removal of a bubble stone and a bit of the dies ( the bubble was formed by stne flowing into a void in the impression)
the correct answer is
a. I, III
b. I, III, IV
c. I, III, IV, V
d. II, III, IV, V
e. II, III, V
d.
of the ff , the PRINCIPAL objective of interproximal wedging when placing a restoration is to
a. obtain the desired separation of the teeth
b. mark the gingival extent of the restoration
c. control gingival hemorrhage
d. depress the gingivl tissue
e. increase the pulp
a.
on the basis of present knowledge, dental caries is accepted as
a. noncommunicable insofar as humans are concerned
b. definitely communicabe in both animals and humans
c. communicable in laboratory animals, and possibly in humans
d. noncommunicable in laboratory animals, but possibly in humans
e. hereditary in all mammals
c.
in planning the locationfor placemnt of pins for a pin-retained amalgam, one should provide for
a. atleast 3mm of pin extension into the amalgam
b. parallelism of the pins if more than one is used
c. a pin in the central dentin area of each cusp to be rerstored
d. 1mm of dentin between the pin and the DEJ
e. at least 3mm of pin extension into the dentin
d.
the PROPER position for a dental assistant at the chairside of a right handed operato to assure visibility and uccesssibility to the operating field is at the ____ 0’clock position and ___ the operator.
a. 11; the same height as
b. 3; approximately 4 inches higher than
c. 3; the same height as
d. 11; aprroximately 4 inches higher than
e. 10; approximately 3 inches higher than
b.
one of the advantages of a cas gold inlay is
a. highy pleasing esthetic qualities
b. superior caries inhibitory qualities
c. allowance for a cementing medium to be used
d. capabillity of restoring anatomic form
e. that it prevents further decay
d.
which is the MOST effective means of reducing dental caries in a community by using topical fluoride?
a. fluoridaton of the community watersupply
b. routine topical fluoride application to all children in the public schools
c. routine topical fluoride applicaion by local dentist and dental auxiliaries
d. giving each family with children floride tablets to be dissolved in the childrens drinking water
e. giving each family with children floride drops to be placed in he childrens drinking water
b.
what happens to the surface hardenss of gold foil during condensation?. it
a. is increased
. is decreased
c. remains altered
d. either increases or decrease depending upon the size of condenser point used
e. iether increases or decrease depnding upon the force applied to the condenser
a.
what is ACCEPTABLE procedure to follow when a pin channel perforates the external surface of the tooth an all other factors are favorable?
a. periodontal involvement will mean the eventual loss of the tooth, so extract it now
b. clean the hole and place a ZOE type cement; under nocircumstances can this hole be used for placing a pin
c. a pin maybe placed in this hole if copalite and zinc phosphate cement are used
d. if no other hole can be placed nearby , a pin maybe placed in this channel provided there is no extension beyond the surface of the tooth
e. it is not possible to place a pin extending into the periodontal tissue, so the question is not applicable.
d.
when using the acid etch technique with composite resin solution used to etch enamel is
a. 50 percent silicophosphoric acid
b. 75 percent phosphoric acid in water
c. 25 percent hydrofluric acid in a buffer
d. 50 percent phosphoric acid in water
e. 30 percent hydrochloric acid in salt water
d.
in an occlusal caviy prepared for amalgam , facial and lingua lwalls which slightly converge occlusally (5 degrees er wall) would NOT create weak enamel margins bacause
a. enamel rods forming the margins would still be full length and supported on dnetin
b. the amalgam will support the enamel at the mrgins
c. enmel rods forming the margins need not be full length
d. dentin need not bee supporting the rods forming the enamel margins
e. tomes’ fibers would be strengthened
a.
the shaped of a cavity preparation that BST resist displcement of the restoration in any direction is called ____ form.
a. outline
b. resistance
c. retention
d. convenience
e. restraining
c,
a factor which can MINIMIZE the need for extensive removal of sound tooth substance for prevention of secondary caries is
a. hardness of the enamel
b. shallow pits and fissures
c. general health of the patient
d. low susceptibility to caries
e. strength of the molars
D.
one of the claims for the superiority of composite resin restorations over silicate cement restorations isthat resin restorations
a. prevent galvanic action
b. arepractically insoluble in oral fluids
c. adapt to the walls of the cavity better
d. have a higher coefficient of hermal expansion
e. prevent bacterial infection
b.
if pulp exposure is anticipated , final removal of carious tooth structure is accomplished after the
a. final outline form of the cavity has been established
b. resistance and retention form has been established
c. rubber dam has been placed
e. cavity has been sterilized
e. none of the above
c.
finishing the enamel at the gingival cavosurface angle of class II cavity preparation for amalgam is
a. contraindicated because of the low edge strength of amalgam
b. provided by a steep cavosurface bevel of the enamel margin
c. unnecessary since the ramaining tooth structure is strong
d. provided by planing the cavosurface area to remove enamel prisms not supported by dentin
e. not recommended
d.
pulp capping is an indicated procedure when there is
a. an accidental mechanical exposure in a clean , dry, field
b. no hemorrhage from the exposure
c. pain response t cold
d. a large exposure
e. all of the above
a.
an ACCEPTABLE medicament for treating sensitive eroded areas in anterior teeth is
a. phenol
b. precipitated silver nitrate
c. eugenol or other essential oils
d. a paste composed of sodium fluoride , kaolin and glycerin
e. a ten percent stannous fluoride solution
d.
what is the MINIMAL oclusal clearance in a preparation for a porcelain-fused-to- metal restoration?
a. 0.5mm
b. .0mm
c. 1.5mm
d. 2.0mm
e. 2.5mm
c.
wich of the ff procedures should be accomplished after an inlay is cemented permnently and before the cement has set?
a. remove oclusal interferances
b. deepen the occlusal sluiceways
c. polish the inlay with sand paper disks
d. burnsh all margins for final adaptation
e. complete the polishing by use of rubber cups and fine abrasive
d.
a decrease in which of he ff properties of aliva is ikely to cause a decrease in caries activity?
a. ``pH
b. flow
c. viscosity
d. mineral conent
e. buffering capacity
c.
which of the ff materials has fluoride incorporated into it by the use of fluorideflux in its manufacture?
a. Zinc silicophoshate cement
b. Zinc phosphate cement
c. Polycarboxylate cement
d. BIS-GMA cement
e. EBA- alumnina cement
a.
which of the ff conclusions is CORRECT, if, after six weeks, a pulp cpped tooth is asymptomatic?
a. the pulp capping was a complete success
b. the lack of advrse symptoms maybe temporary innature and detrimental chage may occur at a later time
c. rparative deni formation at the exposure site is complete
d. the adjacent odonoblasts have proliferated to ocver the site of exposure
e. the pulp capping was a complete failure
b.
after a thorough examination , a teen-aged pateint is found to have numerous carious lesions. most of the proximal surfaces of the molars and the premolars are carious to the extent that much of the occlusal enamel appears to be undermined. of the ff courses of treatment, which would be the WISEST to follow?
a. restore all teethas rapidly as possible, using silver amalgam
b. place pteint on a prevention regime and delay treatmet until the effectiveness of home care is evaluated
c. restore all teeth with gold inlays to utilize the stregnth of this material
d. excavate all carious lesions and place intermediary restorative ZOE before coletinga ttreatent plan
e. retore all teeth as slowly as possible ,using silver amalgam
d.
caries activity can be epected to increase in the mouth of
a. n expectnt mother
b. a lactating mother
c. a xerostomatic
d. a rachitic
e. ll of the above
c.
the dietary carbohydrate MOST likely involvedin the etiology of dental caries in man is
a. glucose
b. sucrose
c. dextrn
d. polysaccharide
e. that produced by strp mutans
b.
foremost in the general planning of a patient s dental care is the
a. restoration of all carious lesions
b. comfort and heslth of thepatint
c. establishment of an adequate home care regime
d. all of the above
e. none of the above
b.
the potential for marginal leakage related to temperature change occurs to the GREATEST extent with
a. amalga alloy
b. silicate cement
c. unfilled resin
d. composite resin
e. direct filing gld
c.
marginal leakage of an amalgam restoration is
a. related to the new phases formed
b. decreased as the restoration ages
c. severe thorought the life of the restoration
d. less after initial placement than at six months
e. increased as the restoration ages
b.
dentl wax patterns should be invested as soon as possible after fabrication in order to minimize change in the shape caused by
a. reduce flow
b. drying out of the wax
c. relaxation of internal stress
d. continued expansion of the wax
e. incresed flow
c.
which of th ff is NOT a factor in the extension of the lingual wall of a maxillary class III cavity prepared for direct filing gold? a. aesthetics b occlusion c. access for condensation d. anatomic form of marginal ridge e. none of the above
a.
which of the ff agents may be used on dentin as a cavity medicament because it does not irritate the dental pulp?
a. silver nitrate
b. phenol
c. prednisoloe
d. alcohol
e. chloroform
f. ethyl chloride
c.
which of he ffis the WEAKEST phase of he set amalgam?
a. beta -2
b. gamma
c. gamma-1
d. gamma-2
e. beta-1
d.
in working as a team , the osition of the chariside assistnt should be
a. lower than the dentist to facilitate visibility
b. t the same height as the dentist because they are working as a team
c. higher than the dentist for proper access and visibility to th patients oral cavity
d. varied, depending upon where the dentist is working
e. none of the above
c.
an accurate diagosis for dental caries can be made without theuse of dental radiograph when
a. only premolar teeth are present
b. the patient is pregnant
c. only decidious teeth arre present
d. all posterior proximal surfaces have previously been restored
e. any of the above
e. none of the above
f.
in restoring a claa II cavity , an onlay is indicaed whenthe
a. need for extra retention exists
b. patient has a high caries index
c. opposing tooth has full coverage
d. dentinal support of the cusps is questionable
e. tooth is erupting but has not reached functional occusion
f. all ofthe above
g. none of the above
d.
on a rubberdm replacement which isolated the six maxillary anterior teeth, the dentist observe an unusual amount of wrinkling of the rubber dam between the teeth. this wrinkling is the result of
a. punching the holes too small
b. punching the holes too far apart
c. unching the holes too close together
d. crowding and overlaping of the anterior teeth
e. teeth with broad contacts inisogingivally
b.
a posterior tooth under heavy occlusl oad has cusps undermined with caries. the restorative material of choice would be
a. cst gold
b. silver malgam
c. comosite resin
d. dirent filing gold
e. pure resin
a.
primary prevention of dental caries includes each of the following activities EXCEPT
a. planning the patients diet
b. prophylactic odontomy
c. topical application of a fluoride
d. extending cavity preparation to prevent recurrence
e. none of the above
d.
plpal irritation wold not be expected from any restorative material provided the minimal thickness of the material was . 0.2mm b. 0.5mm c. 1.0mm d. 2.0mm e. 3.0mm
d.
which of the ff types of base materials must NOT be placed in contatc with polymethyl methacrylate because it may inhibit the polymerization of the resin?
a. germicidal
b. zinc phosphate cemen
c. ZOE cements
d. calcium hydroxide distitilled water paste
e. all of the above
c.
which of the ff statements is TRUE regarding chemical adhesion in clinical restorative materials?
a. resin exhibit cheical adhesive properties to hard tooth structure in the mouth
b. cheical adhesion to hard tooth tissue under oral conditions does not exist
c. recent techniques of acid etching of enamel have produced chemical adhesion ti enamel in the mouth
d. chemical adhesion is demonstrated in clinical peformance of polycarboxylatecement
d.
which of the ff statements describe composite resins?
I. they can be placed and finished at the same appoinment
II. they are more color stable than unfilled direct filling resins
III. tehy are similar to amalgam with respect to coefficient of thermal expansion
IV. the finished surface tends to be somewhat rough
the correct answer is
a. I, II
b. I, IV
c. I, III, IV
d. II, III
e. II, III, IV
f. all of the above
c.
a young patient receive endodontic theray on the maxillary left central incisor. the tooth now is indicated for anesthetic pin-retained restoration as an interim treatment. which of the ff kinds of pins should be used? I. self threading pins II. friction locked pins III. serrated cemented pins IV. self shearing pins V. non- serrated cemented pins the correct answer is a. I, III b. I, V c. II, III d. II, V e. III, IV f. III, V
A.
use of a rubber dam is MOST indicated for which of the ff procedures? I. removal of carious dentin from deep lesions II. pulp capping III. placement of direct fillin gold IV. removal of an old amalgam resoration V. opening into the pul chamber to drain an acute periapical abscess the correect answer is a. I, II, III b. I, II, V c. I, III, IV d. II, III, V e.IV, V
a.
which of the ff aid in the diagnosis of the incipient proximal carious lesion? I. II. III. IV. V. the correct answer is a. I. II. III b. I, II, IV c. I, III, V d. II, IV, V e. III. IV. V f. all of the above
f.
the anterior determinant of occlusion is the
a. horizontal and vertical overlap relation of anterior teeth
b. horizontal overlap relation of anterio teeth only
c. vertical overlap in relation to anterior teeth only
d. cuspal inclination in degrees
e. cuspal declination in degrees
a.
in the preparation of a cavity for restoration with composite resin, all cavosurface angles should be a. well-rounded b. right angles c,. acute angles d. obtuse angles e. even
b.
a FREQUENT cause of interdentl papillae protruding from beneath the rubber dam is
a. edematous gingival tissues
b. holes placed toot far apart
c. using a light weight dam
d. holes placed too close together
e. not using individual ligation of each tooth
d.
following removal of the gingival retraction , a small preparation for a hydrocolloid impression, a small amount of bleeding from the tissue at the preparations site is prepared. the correct procedure to follow at this point is to
a. procees with the impression because the material is prepared
b. utilize a fulgurationg current on the electrosurgical unit to control bleeding, then proceed
c. place an over-contoured temporary restoration to force th etissue away , and dismiss the patient for impression at the next appointment
d. control bleeding, repack the tissues, and poceed with the impression
e. none of the above
d.
the use of the functional occlusal registration presupposes that
a. the teeth to be restored and excluded
b. the opposing teeth are in need of major restoration
c. it is impossible to make use of an anatomic registration
d. the opposing teeth are in harmony with the remainig dentition
e. the opposing teeth are in need of minor restoration
d.
when placing a matrix band for a class !! amalgam restoration , the gingivo-occlusal width of the band should be trimmed
a. below th emarginal ridge height
b. to be equal to the marginal ridge height
c. to be at least 1mm greater than the expected
d. above the marginal ridge height
e. not at all; its dimensions should remain as they made by the manufacturer
c.
the prpose of prednisolone in conjuction with operative procedures is to
a. reduce the tendency for an acutee inflammatory response within th pulp
b. promote healing of the irritated pulp tissue
c. serve as an obtundent
d. delay healing of the irritated pulp tissue
e. all of the above
a.
two adjacent cavities involving the contact maybe prepared and resolved with composite resin at one appointment bacause
a. the chances of maintaining contact are greatly enhanced
b. they can be packed with one mix
c. this conserves operating time
d. placement and finishing can be completed at the same appointment
e. all of the above
d.
the property with MOST closely describes the ability of a cast gold inlay to be burnished is
a. elastic limit
b. ultimate strength
c. percentage elongation
d. modulus of resilience
e. modulus of elasticity
c
different micro-structure has been described for each form of pure gold; gold foil, mat gold, and grnular or powdered gold. it has been demostrated at the microscopic level that
a. void paces remain in any compacted gold
b. gold foil is more porous than any other form of gold
c. crystalline golds are packed densely more readyly than gold foil
d. proper compaction can remove all voids from the commercially - available direct filling golds
e. gold foil is less porous than any other form of gold
a.
the form of of a clas !! cavity preparation for an amalgam restoration includes:
I. extending thecavity to the line angles of the tooth and beyond
II. extending the cavity proximally to clear contact with the adjacent tooth
III. beveling all enamel walls
IV. removing unsupported enamel along the gingival wall
V. rounding the axio-pulpal line angle
the correct answer is
a. I, II, III
b. I, II, IV
c. II, III, V
d. II, IV, V
e. III, IV, V
f. all of the above
d.
lack of proximal cntact of class II inlay restoration usually results in; I. poor marginal fit II. gingival irritation III. sensitivity oto therma changes IV. food impaction V. a cleaner interproximal space the correct answer is a. I only b. II, III, IV c. II, IV d. IV only e. V only
c.
direct functions of the mature dental pulp include I. enamel formation II. formation of dentin structure III. to furnish nerve and blood suply of teeth IV. cementum formation V periodoantal ligament formation the correct answer is a. I, II, V b. II, III c. II, III, IV d. II, III, V e. III, IV, V f. all of the above
b.
for MOST effective cutting an long usefullness of a tungsten carbide bur, it should be
a. rotating slowly before contacting the tooth
b. rotating rapidly before contacting the tooth
c. placed in contact with the tooth before starting
d. rotating rapidly before entering into the oral caviy
e. placed in contact with the tooth after starting
b.
the GREATEST percentage of tooth loss in the first two decdes of life (except natural loss decidous teeth) is due to
a. periodontal disease
b. treated dental caries
c. untreated dental caries
d. trauma to teeth from accidents
e. none of the above
c.
for a 12-year-old, the treatment of choice for a fractured mandibular lateral incisor involving the mesioincisal angle but not the pulp is
a. etching and placement of a resin restoration
b. a lingual dovetail inlay
c. a pin- retained metallic restoration
d. a porcelain-fused- to- metal crown
e. none of the above
a.
one of the BEST materials for sedation of the dental pulp is
a. cavity varnish
b. calcium hydroxide
c. ZOE
d. zinc silicophosphate cement
e. a proprietary product of sterilized dentin powder and distilled water
c.
during preparation of a cast gold restoraton , the tooth tissue which is weakened by the cavity preparation and subjected to damage by the forces of mastication must be
a. reduced and covered by the cast restoration
b. strengthened by the use of cement or an amalgam core
c. protected by restoring to full coverage of the tooth
d. beveld, and the patient remainded not to exert undue force on the tooth
e. weakened by the use of cement or an amalgam core
a.
a male pateint has a fractured distoincisal angle on a maxillary lateral incisor had been restored previously with silicatecement. the remaining tooth tissue between the restoration and the mesioincisal angle contains little bulk and is of doubtful strength. the aptient desire a restoration which will provide the longest period of service. the material and restoration of choice is
a. a 3/4 cast gold crown
b. compacted gold with pin
c. an MID composite resin with pins etched technique
d. an MID cast gol pin- ledge restoration
e. a porcelain fused to metal full crown
e.
if caries prone animals were fed cariogenic diets by stomach tubes, their caries activity woud be
a. the same as it would have been if they had eaten the food
b. more than if they had eaten the food
c. less than if they had eaten the food
d. essentially stopped
e. essentialy prolonged
d.
direct filling gold is heated prior to its condesation for the purpose of
a. re- estblishing its adhesive properties
b. volatilizig surface contaminants
c. re- crystallizing
d. sterilization
e. annealing
f. softening
b.
a patient has nonspecific pain in the permanent maxillary first molar which ha occurence periodontically since he was hit in the chin. examination reveals an apparently healthy tooth both clinically and radographically ith a conservative MOD inlay. examination of the preparation and casting shows a quality casing. the MOST probable cause of the pain is
a. maxillary sinusitis
b. a mesio-distal fracture of the tooth
c. a facio-lingual fracture of the tooth
d. leakage anf therefore, chemical irritation due to faulty cementation of the inlay
e. none of the above
b
a CHIEF clinical advantage of the improved ZOE cements over zinc phosphate cement for cementaion of cast restorations is a. lower solubility b. lower film thickness c. less pulpal irritation d. higher compressive strenght e, adhesion to tooth substancete
c.
class II cavitie prepared for cast gold differ from those prepaed for amalgam in
a. principles of proximal extension
b. principles of resistance form
c. use of hand cutting instruments
d. use of bevels
e. both A and B above
d.
the MOST retentive pin technique is the
a. thread-mate system
b. friction lock system
c. cemented system
d. all of the above
e. none of the baove
a.
the retention for any class V restoratio is placed
a. in mesial and distal areas
b. in occlusal and gingival areas
c. at hte expense of the axial wall
d. in all except the facial walls
e. in all except the mesial and distal areas
b.
in porcelain -fused-to- metal restorations, the MOST commonly used lloys have a base of
a. tin
b. gold
c. nickel
d. silver
e. platinum
f. palladium
b.
a patient complains of sensitivity in a mandibular premolar. a well- condensed class V amalgam restoration was placed in that tooth five months previously , with no discomfort for the first four moths. Since then, it has become increasingly sensitive. the problem probably relates to
a. marginal lekage
b. fractured restoration
c. irreversible pulpal damage
d. toothbrush abrasion
e. none of the above
c.
a cavity repared for a powdered gold restoration on the proximal surface of an naterior tooth always
a. includes the contact areas
b. extends beneth the crest of ethe gingival tissue
c. contains a 2-planed lingual wall and a -planed facial wall
d. ends in the facial embrasure to facilitate finifhing and maintenenace of the margins
e. has enamel walls which meet the surface of the ooth by following the general direction of the enamel rods
e.
periodontal surgery has exposed 3mm of the cemental root surface. pre-existing coronal class V restoration which formerly extended to the cervial line must now be placed because of recurrect caries. the design for this replacement requires that the
a. gingival margin be extended to the new location of the gingivl sulcus
b. gingival margin be extended to sound tooth structure
c. cervical line be placed in the restoration as it originally appeared o this surface of the tooth
d. surface of the restoration be over contoured to protect the newly positioned gingivl attachment
e. nne of the above
b.
a reason for replacing silicate cement and unfilled resin restoration in the distal surfaces of maxillary canines is that the restorations
a. discolor and are not esthetic
b. will ot maintain the mesiodistal dimension of the tooth
c. cannot be placed to established contact
d. cannot be properly finished in this area and thus will cause gingival irritation
e. can be placed to established contact
b.
a patient has a toothached. radiograph show a deep carious lesion. there is no detectable pulpal exposure upon excavation of decay. the BEST tretment at this time is
a. direct pulp cap
b. root canal therpy
c. a permanent resoration after placing a suitable base
d. placement of a zinc phosphate cement temporary restoration
e. placement of two coats of cavity varnish and an amalgam restoration
c.
mechanical separators used in class III direct filling gold procedures should routinely be stabilized to:
I. minimize trauma to the gingival tissues
II. afford oppurtunity for greater amount of separation
III. provide more rigid resistance to the forces of condensation
IV. provide iniform support during instrumentation
the correct answer is
a. I, II,
b. I, II, III
c. I, III
d. I, III, IV
e. II, IV
f. all of the above
d.
during restorstive provcedure is posterior teeth, consideration must be given to the gingivl embrasure. the gingivl tissue is a teenger
I. fils the gingival embrasure
II. is pyramidal when viewed in a faciolingiual cross section
III. is “col” shaped (facial and lingual peaks of tissue)
IV. fills a space smaller than the occlusal embrasue
the correect answer is
a. I only
b. I, II, III
c. I, III
d. I, III, IV
e. III only
c.
the thermal insulating capacity of a cement base is principally related to I. thickness of the base placed II. density of he base placed III. thermal conductivity of the set base IV. coefficient of thermal expansion of the set base V. powder/liquid ratio of the cement mix the correct answer is a. I, II, III b. I, II, IV c. I, III, V d. II, III, IV e. II, III, V
a.
one of the claimes for the superiority of composite resin restoration over silicate cement restoration is that the resin restoration
a. produce galvanic action
b. are practically insoluble in oral fluids
c. adapt to the walls of the cavity better
d. have a higher coefficient of thermal expansion
e. expedite galvanic action
b.
untreated dental caries may cause
a. pain
b. gingivitis
c. dietary deficiency
d. occlusal interference
e. all of he above
f. only A and D above
e.
cohesion of direct filling gold at room temperature is an example of the principle of
a. wedging
b. annealing
c. adaptability
d. atomic attraction
e. differentiation
d.
a 14 year old patient has a proximl cavity of posterior tooth. there are no missing teeth. oral hygience and tooth relationship areexcellent. the cavity preparation can be limited to the involved proximal surface if
a. x-ray examination of the proximal area of the affected tooth reveals that the crious process has not reached the dentinoenamel junction
b. the facial and lingual cavosurface margins of the cavity preparation can be extended to self cleansing areas
c. the carious lesion does not undermine the enamel at the marginal ridge
d. the carious lesion does not involve the conact area
e. none of the above
e.
hand utting instruments classified as angle formers are used MOST frequently in an
a. class III cavity prepared for a composite resin restoration
b. MO cavity in molar prepared for an inlay
c. class III cavity prepared for direrct filling gold
d. class II cavity prepared for amalgam
e. class I cavity prepared for amalgam
c.
the high copper amalgam dispersion -type allys are characterized by
I. low creep
II. little or no gamma phase present in set amalgam
III. little or no gamma 2 phase present in set amalgam
IV. Less marginal breakdown
the correct answer is
a. I, II
b. I, III
c. I, II
d. I, IV
I, II, III, IV
C
a clinical amalgam restoration which contains 57% mercury would be likely to exhibit I. marginal breakdown or marginal fractue II. gross delayed expansion III. no unusual behavior IV. surface deterioration the correct answer is a. I only b. I, II, IV c. I, II d. I, IV e. III only
d.
agents used to polish an amalgam restoration should be moistened to reduce I.producing of heat II scarring of the restoration III.cutting sction of the abrasive IV. the effects of dehydrtion V. the potential for widening the interface between the restoration and the tooth the correct answer is a. I only b. I, II c. I, III d. I, IV e. II, III, V f. II, IV g. all o f the above
a.
