PROSTHODONTICS Sample Questions Flashcards
(30 cards)
the impression material that is mainly composed of sodium or potassium salts of alginic acids is \_\_\_. A. polyether B. irreversible hydrocolloid C. polyvinyl siloxane D. polysulfide
B
a patient with complete dentures presents with angular cheilitis. a review of recent medical history revealed that vitamin deficiency is not a factor. a possible predisposing factor is ___.
A. excessive vertical dimension of occlusion
B. a closed or insufficient vertical dimension
C. improper balance of the occlusion
D. poor contour of the denture base
B
all of the following are a feature of papillary hyperplasia EXCEPT one. which is the EXCEPTION?
A. it is a proliferative bone disease
B. it can be caused by wearing dentures at night
C. it can be caused by poor oral hygiene
D. it can be caused by an ill-fitting denture
A
for optimal esthetics when setting maxillary denture teeth, the incisal edges of the maxillary incisors should follow the \_\_\_. A. lower lips during smiling B. upper lips during smiling C. lower lips when relaxed D. upper lips when relaxed
A
excessive monomer added to acrylic resins results in \_\_\_. A. increased expansion B. increased heat generation C. increased shrinkage D. increased strength
C
what is the purpose of adjusting the occlusion in dentures? A. to obtain balanced occlusion B. to stabilize dentures C. to obtain even occlusal contacts D. all of the above
D
which of the following may be a consequence of occlusal trauma on implants?
A. widening of the periodontal ligament
B. soft tissue sore area around the tooth
C. bone loss
D. all of the above
C
which of the following is TRUE of an occlusal rest for an RPD?
1. one third facial lingual width of the tooth
2. 1.5mm deep for base metal
3. 2.0mm labiolingual width of the tooth
4. floor inclines apically toward the center of the tooth
A. all of the above
B. 1, 3, and 4
C. 1, 2, and 4
D. 3 and 4
C
a patient is unhappy with the esthetics of an anterior metal-ceramic crown, complaining that it looks too opaque in the incisal third. the reason for this is most likely ___.
A. using the incorrect opaque porcelain shade
B. inadequate vacuum during porcelain firing
C. not masking the metal well enough with the opaque
D. the tooth was prepared in a single facial plane
D
an endodontially treated tooth was restored with a cast post and core and a metal-ceramic crown. the patient complains of pain, especially on biting, 3 months later. radiographic findings and tooth mobility tests are normal. the MOST probable cause of pain is \_\_\_. A. a loose crown B. psychosomatic C. a vertical root fracture D. a premature eccentric contact
C
for an occlusal appliance used for muscle relaxation to be effective, the condyles must be located in their most stable position from a musculoskeletal perspective. this is \_\_\_. A. centric occlusion B. at the vertical dimension of rest C. centric relation D. maximum intercuspal position
C
a diagnostic wax-up is indicated when ___.
A. reestablishing anterior guidance
B. a provisional fixed prosthesis is to be fabricated
C. uncertainty exists regarding esthetics
D. all of the above
D
which of the following is the MOST important predictor of clinical success of a cast post and core?
A. amount of remaining coronal tooth structure
B. post length
C. post diameter
D. positive horizontal stop
A
factors associated with bone loss include \_\_\_. A. initial implant instability B. excessive occlusal force C. inadequate hygiene D. inadequate prosthesis fit E. all of the above
E
which of the following statements is true concerning the evaluation of the occlusion on a cast restoration?
A. the restoration is in proper occlusion if it holds shim stock
B. the restoration is in proper occlusion if the adjacent teeth hold shim stock
C. the restoration is in proper occlusion when articulating paper marks multiple points of contact on the restoration
D. A, B, and C
E. none of the above
D
in a kennedy class I arch in which all molars and the first premolar are missing and the rest of the teeth have good periodontal support, the preferred choice of treatment is ___.
A. RDP replacing all missing teeth
B. FDP replacing the missing premolar and RDP replacing the molars
C. implant-supported crowns replacing the first premolars and RDP replacing the molars
D. A and B are preferred over C
E. B and C are preferred over A
E
the surveyor is used to ___.
A. aid in the placement of an intracoronal retainer
B. block out a master cast
C. measure a specific depth of an undercut
D. all of the above
E. A and B
D
a dentist is preparing all maxillary anterior teeth for metal-ceramic crowns. which of the following procedures is necessary to preserve and restore anterior guidance?
A. protrusive record
B. template for provisional restorations
C. custom incisal guide table
D. interocclusal record in centric relation
C
a radiolucency near the apex of tooth #28 is seen radiographically. the tooth is asymptomatic and does not have caries or periodontal problems. what is the MOST likely cause of the radiolucency? A. submandibular fossa B. periapical granuloma C. complex compound odontoma D. mental foramen
D
the minor connector for a mandibular distal extension base should extend posteriorly about ___.
A. two thirds the length of the edentulous ridge
B. half the length of the edentulous ridge
C. one third the length of the edentulous ridge
D. as long as possible
A
the characteristics of a major connector that contribute to health and well-being include which of the following?
A. it is rigid and provides unification of the arch stability
B. it does not substantially alter the natural contour of the lingual surface of the mandibular alveolar ridge or the palatal vault
C. it contributes to the support of the prosthesis
D. all of the above
E. only A and B
D
when does an FDP that was cast in one piece need to be sectioned?
A. when a cantilever pontic is used
B. when the fit cannot be achieved or verified with a one-piece cast
C. when single crowns are adjacent to the FDP
D. always to achieve a good fit
B
when soldering an FDP, what is the effect of flux when heated on the area to be soldered?
A. to remove oxides from the metal surface
B. to displace metal ions from the area
C. to change the composition of the alloy
D. to reduce the surface tension of the metal
A
which component of an RDP is spoon-shaped and slightly inclined apically from the marginal ridge of a tooth? A. indirect retainer B. minor connector C. rest D. lingual bar
C
