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1Prosthodontics anad Dental Materials1 strength of a soldered connector of a fixed partial denture is best enhanced by: a. using a higher carat solder b its height c. increasing its width d the gap2 dentist primarily splints adjacent abutment teeth in a fixed partial denture in order to: a the distr...

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Cluster IV: Prosthodontics anad Dental Materials Prosthodontics anad Dental Materials

1. The strength of a soldered connector of a fixed partial denture is best enhanced by: a. using a higher carat solder b.increasing its height c. increasing its width d. increasing the gap 2. A dentist primarily splints adjacent abutment teeth in a fixed partial denture in order to: a. improve the distribution of the occlusal load b. improve embrasure contours c. stabilize the abutment teeth d. improve mesiodistal spacing 3. A dentist determined that it would be necessary to adjust a patient's denture teeth to correct the centric occlusion at the wax try-in appointment. Which of the following this dentist do? a. Make a new centric relation record and remount b. Make a new face bow and centric record c. Make a slight occlusal adjustments in the mouth d. Make adjustments only for Class ll jaw relation patients 4. Major connectors most frequently encounter interferences from which of the following? a. Lingually inclined maxillary molars b.Lingually inclined mandibular premolars c. Facially inclined maxillary molars and premolars d. Bony areas on the facial aspect of edentulous spaces 5. In constructing a fixed partial denture for a patient. the dentist will use a hygienic pontic. Which of the following will primarily determine the faciolingual dimension of the occlusal portion of this pontic? a. The length of the pontic. b. The masticatory force of the patient. c. The position of the opposing contact areas. d. The width and crestal position of the edentulous ridge. 1

6. In the construction of a removable partial denture. when is a lingual plate preferred over a lingual bar connector? a. When more rigidity is required. b. When the remaining teeth are widely spaced. c. When the remaining anterior teeth are mobile. d. When there is no space in the floor of the mouth. 7. Which of the following explains why mandibular molars should not be placed over the ascending area of the mandible? a. The denture base ends where the ramus ascends. b. The molars would interfere with the retromolar pad. c. The teeth in this area would encroach on the tongue space d. The teeth in this area would interfere with the action of the masseter muscle. e. The occlusal forces over the inclined ramus would dislodge the mandibular denture. 8. Excessive depth of the posterior palatal seal usually results in: a. unseating of the denture b. a tingling sensation c. greater retention d. increased gagging 9. For a complete denture balanced occlusion. the lingual cusps of maxillary posterior teeth on the non-working side contacts which areas of the mandibular posterior teeth? a. The facial inclines of the lingual cusps b. The lingual inclines of the lingual cusps c. The lingual inclines of the facial cusps d. The central fossae 10. The lower one third of a patient’s face appears too short and there is an apparent loss of the vermillion border of the lips. Which of the following procedures is indicated to correct the situation? a. Moving the anterior teeth facially.

b. Increasing the interocclusal distance. c. Decreasing the occlusal vertical dimension. d.Increasing the occlusal vertical dimension.

Cluster IV: Prosthodontics anad Dental Materials

11. The dentist should place the terminus of a retentive clasp arm at (in) the: a. junction of the gingival and middle one third of the clinical crown b. junction of the middle and occlusal one third of the clinical crown c. level of the free gingival margin d. occlusal one third of the clinical crown 12. The speech sounds that bring the mandible closest to the maxilla are the: a. “s” sounds b. B. “t‘ and ‘v‘ sounds c. ‘t' and “th” sounds d. vowel sounds 13. For an extension-base RPD. which of the following is the most important to maintain the remaining supporting tissues? a. Using stress releasing clasps b.Preserving denture base support c. limiting eccentric occlusal contacts d. using plastic teeth

17. In a complete denture patient, when the teeth. occlusion rims and central bearing point are in contact and the mandible is in centric relation. the length of the face is known as the: a. interocclusal rest space b. vertical dimension c. physiologic rest position d. rest vertical dimension e. occlusal vertical dimension 18. In an edentulous patient. the coronoid process can: a. limit the distal extension of the mandibular denture. b. effect the position and arrangement of the posterior tooth. c. limit the thickness of the denture flange in the maxillary buccal space. d. determine the location of the posterior palatal seal of the maxillary denture.

14. The primary advantage of an external splint over an internal splint is: a. increased rigidity b. increased retention c. increased durability d.conservation of tooth surface

19. Which of the following is the primary reason for using plastic teeth in a removable partial denture? Plastic teeth are: a. resistant to wear b. resistant to stains c. esthetically acceptable d.retained well in acrylic resin

15. A dentist relined a patient‘s maxillary complete denture. This patient returned repeatedly for adjustments of the erythematous areas on the ridge crest Which of the following is the most likely cause? a.An allergy to the acrylic resin that was used for relining. b. Presence of a pressure spot in the relined impression c.The loss of even centric relation contacts. d. A decrease in the occlusal vertical dimension.

20. A patient who has a moderate bony undercut on the facial from canine-tocanine needs an immediate maxillary denture. There is also a tuberosity that is severely undercut. This patient is best treated by: a. reducing surgically the tuberosity only. b. reducing surgically the facial bony undercut only. c. reducing surgically both tuberosity and facial bony undercut. d. leaving the bony undercuts and relieving the denture base.

16. The one relation of the condyles to the fossae in which a pure hinging movements is possible is: a. centric occlusion b. retruded contact position 2 c. postural position of the mandible (rest

21. Which of the following direct retainers for a removable partial denture is the most esthetic? a. A bar clasp b. A circumferential clasp

vertical dimension) d. transverse horizontal axis (terminal hinge position)

c. an intracoronal attachment d. a round. wrought-wire clasp

Cluster IV: Prosthodontics anad Dental Materials

22. Under which of the following conditions will it be critical to mount a patient's casts on the true hinge axis? a. When the patient has a severe Class ll occlusal relation. b. When the patient requires several fixed partial dentures. c. When the dentist plans to change the vertical dimension through restorations. d. When the dentist plans to fabricate dentures with high-cusped teeth on a fully adjusted articulator. 23. In complete denture fabrication. which of the following regulate/s the paths of the condyles in mandibular movements? a. the height of the cusps of posterior teeth. b. The amount of horizontal and vertical overlap. c. The size and shape of the bony losses and the menisci and muscular influence. d. The vertical occlusion, centric relation and degree of compensating curve. 24. Which of the following best explains why the dentist should provide a postpalatal seal in a complete maxillary denture? The seal will compensate for. a. errors in fabrication b. tissue displacement c. polymerization and cooling shrinkage d. deformation of the impression material 25. For complete dentures. which of the following three factors affect the correct positioning of lips? a. Face-bow transfer. position of teeth, and correct rest vertical dimension. b. Face-bow transfer. thickness of the anterior border. and correct occlusal vertical c. Dimension. d. Correct rest vertical dimension. thickness of the anterior border and position of teeth. e.Correct occlusal vertical dimension. thickness of the anterior border and position of teeth. 26. Which of the following jaw-relation records should be used for setting both the medial and superior condylar guides on an arcon articulator? a. Intercuspation b. Centric relation 3 c.lateral lnterocclusal records

27. An incorrect occlusal vertical dimension causes a patient to overclose and to have a poor facial profile. To correct this problem, the dentist should do which of the following? a. increase the rest vertical dimension and increase the interocclusal distance b. decrease the rest vertical dimension and diminish the interocclusal distance c. decrease the occlusal vertical dimension and increase interocclusal distance d.increase the occlusal vertical dimension and diminish the interocclusal distance 28. Which of the following adverse conditions may arise if occlusal vertical dimension is increased? a. The closing muscles may become strained b. The opening muscles may become strained c. The closing muscles may become too relaxed d. Soreness may occur at the comers of the mouth. 29. A patient has a chronically tender. knifeedge mandibular residual ridge. ln fabricating a complete denture for this patient. a dentist should consider which of the following? a. Maximal extension of the denture- to distribute forces of occlusion over a greater area. b. Minimal extension of the denture- to limit tenderness to a smaller area. c. Decreased occlusal vertical dimension- to decrease biting forces. d. A broad occlusal table~ to provide a firmer contact in eccentric jar relations. 30. Tripod marks are placed on the cast after surveying for which of the following reasons? a. To record the undercut areas on the abutment teeth. b. To help mount the cast on the articulator. c. To record the orientation of the cast to the articulator. d.To record the orientation of the cast to the surveyor. 31. ln a complete maxillary denture, accurate adaptation of the border of the maxillary facial flange affects which of the following the most? a. Speech

d. protruslve interocclusal records

b. Support c. Stability d.esthetics

Cluster IV: Prosthodontics anad Dental Materials

32. The distofacial periphery of the mandibular impression should receive special attention. Which of the following anatomical structures might cause soreness if the denture is overextended? a.Masseter b. Buccinator c. pterygmandlbular raphe d. intenal pterygoid e. lateral tendon of the temporal 33. A patient needs relining of both maxillary complete denture and mandibular distalextension partial denture. The recommended procedure is to: a. make impression of both simultaneously b. start first on the maxillary complete denture c. start first with the least stable prosthesis d.relate first the mandibular partial denture frame 34. Which of the following mechanical properties limits the amount of adjustment of a base metal removable clasp arm? a. Hardness b. Stiffness c.Elongation d. tensile strength 35. A patient needs relining of both maxillary complete denture and mandibular distalextension partial denture. The recommended procedure is to: a. make impression of both simultaneously b. start first on the maxillary complete denture c. start first with the least stable prosthesis d.relate first the mandibular partial denture frame 36. In lateral movements. the non-working condyle moves in what direction? a. Cut, back and up b. Up, back and down c. Down, forward and medially d. Down, forward and laterally e. none of the above. 37. The most likely tissue reaction to gross overextension of a complete denture that has been worn for a long time is: a. epulis fissuratum 4 b. pyogenic granuloma

38. The relationship of denture base to bone that resists dislodgement of the denture in a horizontal direction is: a. Support b. Pressure c. Esthetics d.stability 39. Failure of partial denture due tompoor clasp design can be best avoided by: a. Using stressbreakers b. using lntracoronal attachments c. Using bar-type clasps d.altering booth contours e. clasping only those teeth with fairly long crowns and normal bone support 40. Repealed 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 designed framework 41. A patient who wears complete denture is having trouble pronouncing the letter “t". This is probably caused by: a. too thick a palatal seal area b. too thick a base in the mandibular denture c. incorrect positioning of maxillary incisors d. improper positioning of mandibular incisors 42. The distoiingual extension of the mandibular impression for a complete denture is limited by the action of the: a. stylohyoid muscle b. medial pterygold muscle c. lateral pterygoid muscle d.superior constrictor muscle 43. In RPD design. Guiding planes serve to: a. aid in balancing occlusion b.assure predictable clasp retention c. from right angles to the occlusal plane d. eliminate the necessity for precision attachments e. eliminate the necessity for a back-action clasp

c. papillary hyperplasia d. giant cell reparative granuloma

44. When the path of dislodgement is not controlled and rotational dislodgement

Cluster IV: Prosthodontics anad Dental Materials of extension bases occurs. remotely located vertical metal stops placed in prepared seats can be used to enhance the effectiveness of retentive clasps. The vertical metal stops are: a. indirect claps b. remote retainer c. indirect retainers d. forward retainers e. passive retainers 45. Excessive vertical dimension of occlusion may result in a. poor denture retention b. increased interocclusal distance c. drooping of the comers of the mouth d. creases and wrinkles around the lip e.trauma to underlying supporting tissues 46. An advantage of a wide. thin palatal bar compared with a narrow bar is that the wide bar: a. is more stable b. is easier to polish c. can be rigid with less built d. is less irritating to the soft tissue 47. When a cusp is in deflective occlusal contact in centric relation. but does not contact in one or more of the eccentric movements. grinding should be performed on: a. both the cusp and the opposing area b.the opposing fossa or the marginal ridge c. the cusp that is in deflective occlusal contact d. the opposing areas in eccentric positions. 48. Proper lip support for a patient with complete dentures is provided primarily by the; a. convex surface of the labial flange b. rounded contours of interdental papillae c. proper pronouncement of sibilant sounds d. thickness of the border in the vestibule e. facial surfaces of teeth and stimulated attached gingiva. 49. in determining the posterior limit of a maxillary denture base. which of the following is on the posterior border? a. hamular notch b. Hamular process c. fovea palatini 5 d. vibrating line

a. Xerostomia b. Air chamber in midpalate c. Foreshortened denture bases d. Increased salivary film thickness e.Accurate adaptation of the denture base to the mucosa 51. Treatment of choice for a patient with a maxillary complete denture with severe bilateral tuberosity undercuts is to: a. remove both tuberosity undercuts b. reduce the tissue bilaterally c. reduce the tissue on one side . if possible d. none of the above. No treatment is necessary. 52. Translation in a mandibular opening movement occurs; a. on closing from centric relation b. on initial opening from centric relation c. in the upper compartment of the TMJ d. in the lower compartment of the TMJ 53. 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 54. A patient complains of “looseness” with a new bilateral distal extension RPD. This is probably caused by: a. deflective occlusal contacts b. thin flanges on acrylic bases c. passive clasp pressure on abutment teeth d. insufficient facial overlap on posterior teeth 55. When the mandible is in its physiologic rest position. the distance between occluding surfaces of maxillary and mandibular teeth or occlusion rim is; a. centric occlusion b. vertical dimension c. lnterocclusal distance d. vertical dimension of rest

56. Which of the following design characteristics of a partial denture is...