Fixed Partial Dentures : Pontics and Finish Lines Multiple Choice Questions
1. Egg shaped pontic is indicated for the replacement of:
Answer: A. Mandibular posteriors
B. Mandibular anteriors
C. Maxillary posteriors
D. Maxillary anteriors
2. A pontic as compared to a missing posterior tooth should be:
A. same dimensions as that of natural teeth
Answer: B. same dimensions mesiodistally but less faciolingually
C. same dimensions faciolingually but less mesiodistally
D. larger than natural tooth, to exert same forces on mastication
3. Which of the following will primarily determine the faciolingual dimension of the occlusal portion of a hygienic pontic?
A. The length of the pontic
B. The masticatory force of the patient
Answer: C. The position of the opposing contact areas
D. The width and crestal position of the edentulous ridge
4. Most appropriate pontic design is:
A. it should fill the missing teeth area
B. greater lingual embrasure
Answer: C. should contact mucosa but should not irritate it
D. none of the above
5. A fixed bridge with pontics rigidly fixed to the retainers provides:
A. strength to the abutments
Answer: B. reduction of stress associated with restoration
C. Aesthetics to the fixed bridge
D. reciprocation of forces acting on the pontic
6. In the mandibular posterior region, which of the following design is indicated for the pontic in the fixed bridge?
Answer: A. Spheroidal
B. Modified ridge lap
C. Ridge lap
D. Conical
7. Ridge lap design of pontic is indicated for the replacement of a:
A. Maxillary first molar
Answer: B. Maxillary central incisor
C. Mandibular first molar
D. Mandibular second premolar
8. Rough, poorly polished areas of pontics may cause:
A. Halitosis
B. Discomfort
C. Chronic inflammation of the ridge tissue
Answer: D. All of the above
9. Pontic should be:
A. Convex buccolingually
Answer: B. Convex mesiodistally
C. Convex buccolingually and concave mesiodistally
D. concave mesiodistally
10. The pontic design of choice in the appearance zone of maxillary and mandibular bridge:
A. Hygienic
Answer: B. Modified ridge lap
C. Saddle
D. Conical
11. Which of the following is not indicated for maxillary anterior pontic?
A. Ridge lap
B. Modified ridge lap
Answer: C. Hygienic
D. Ovate
12. Most suitable pontic:
Answer: A. should have passive contact with ridge and no blanching of tissue
B. should contact with some blanching of the tissue
C. ridge area scrapped in cast and pontic in gold alloy
D. ridge area scrapped in cast and pontic in porcelain
13. Undersurface of pontic should be:
A. Concave mesiodistally and convex buccolingually
Answer: B. Convex mesiodistally and concave buccolingually
C. Convex in all directions
D. Concave in all directions
14. In the posterior maxilla, the pontic of choice is:
A. Sanitary
B. Point contact
C. Bullet shaped
Answer: D. Modified ridge lap
15. The pontic that should be used in the posterior mandibular area is described by the term:
A. Marble contact
B. Modified saddle
C. Saddle
Answer: D. Sanitary
16. Most suitable pontic for maxillary posterior area:
Answer: A. Trupontic or long pin pontic
B. Sanitary pontic
C. Flat back pontic with porcelain facing
D. Pin facing pontic
17. A pontic should:
A. restore tooth function
B. restore tooth form
C. be biologically acceptable
Answer: D. all of the above
18. Faciolingual width of pontic is determined by:
Answer: A. Opposing centric stops
B. Height of the bridges
C. Stresses created by the patient
D. length of the bridge
19. Which of the following statement about pontics is true?
A. Posterior pontics should avoid balancing side contact
B. Should avoid all occlusal contacts
C. Pontics ahould permit flossing
Answer: D. Both A and C
20. Which ridge relationship is observed in the modified ridge lap pontic design?
A. At least 2 mm above the ridge
B. Point contact on the ridge crest
Answer: C. Facial contact only
D. Straddles the ridge faciolingually
21. In constructing an anterior fixed partial denture with multiple adjacent pontics, facial embrasures are reduced in size to enhance:
Answer: A. Esthetics
B. Cleansability
C. Proper tissue health
D. All of the above
22. A reverse 3/4 crown is indicated on a mandibular molar when:
A. a reverse 3/4 crown is more esthetic
B. the facial surface offers more retention than the lingual surface
Answer: C. anatomic form of the tooth and functional relationships determine
D. all of the above
23. In order to maintain the health of the tissue beneath a pontic, it is desirable to:
A. Have slight blanching of tissue when the restoration is placed
B. Have minimal tissue coverage
C. Have passive contact with the ridge with no apparent blanching
Answer: D. B and C
24. Pontic design not indicated in anterior region:
A. Ovate pontic
B. Modified ridge lap pontic
C. Stein pontic
Answer: D. Spheroidal pontic
25. TO replace a missing canine, the best pontic design is:
Answer: A. Modified ridge lap
B. Ridge lap
C. Ovoid
D. Sanitary
26. Ovate pontics are used in:
A. Well rounded ridges
B. Knife edged ridges
Answer: C. Recently extracted tooth sockets
D. Flat ridges
27. The pontic of mandibular posterior region should be:
Answer: A. Point contact
B. Saddle
C. Modified ridge lap
D. Ovate
28. The main drawback of a saddle pontic is:
Answer: A. It is unhygienic
B. It is unaesthetic
C. It is bulky
D. It does not restore tooth contours
29. To replace a missing canine, the best pontic design is:
Answer: A. Modified ridge lap
B. ridge lap
C. ovoid
D. Sanitary
30. Which of the following pontic design is non mucosal type?
A. Ridge lap
B. Modified ridge lap
Answer: C. Sanitary
D. All of the above
31. Perel Pontic is:
A. Ovate
B. Conical
C. Hygienic
Answer: D. Modified Sanitary
32. Which type of cervical finish line prepared will result in an over contoured restoration?
A. Chamfer
Answer: B. Knife edge
C. Shoulder
D. Shoulder with bevel
33. The gingival finish line on a tipped molar should be:
A. Shoulder
B. Chamfer
Answer: C. Knife edge
D. Shoulder with bevel
34. The best finish line for anterior metal ceramic crown is:
A. Chamfer with bevel
B. Heavy chamfer
C. Shoulder
Answer: D. Shoulder with bevel
35. Which of the following burs is used for developing chamfer margins?
A. Flat ended, tapered diamond cylinder
Answer: B. Round ended, tapered diamond cylinder
C. Twelve fluted carbide burs
D. End cutting burs
36. Preparation of shoulder in anterior tooth is done with:
A. Inverted cone bur
B. Plain fissure bur
C. Cross cut fissure bur
Answer: D. End cutting bur
37. Gingival finish lines are placed:
Answer: A. Supra/subgingivally according to need
B. For better cleansing
C. Subgingivally only
D. Supragingivally only
38. The finish line used in complete metal cast crown is:
Answer: A. Chamfer
B. Chamfer with bevel
C. Feather edge
D. Shoulder
39. The best gingival finish line for porcelain jacket crown is:
A. Chamfer
B. Knife edge
Answer: C. Shoulder
D. Shoulder on facial and chamfer on lingual side
40. The finish line which do not have a sliding fit is:
A. Chamfer
B. Knife edge
Answer: C. Shoulder
D. Bevel
41. Identify the correctly matched statement.
A. Shoulder – arduous to prepare
B. Knife edge – indicated in young patients
C. Chamfer – most recommended finish line for complete metal crowns
Answer: D. All of the above
42. Identify the wrong statement regarding shoulder preparation.
A. More commonly recommended in porcelain crowns
B. It is perpendicular to the axial tooth preparation
Answer: C. Conserves tooth structure compared to other finish lines
D. Provides butt type of joint
43. An advantage of shoulder preparation when making a porcelain crown is:
A. Facilitates fitting and seating of the casting
B. laboratory technician can better discern the area on the die
Answer: C. Provides for thickness of the porcelain
D. It facilitates taking the impression of the preparation
44. The ultimate in finish lines that permit an acute margin of metal is:
A. Shoulder
B. Chamfer
Answer: C. Knife edge
D. Shoulder with bevel
45. All of the following are the advantages of shoulder finish line except:
A. Good crown contour
B. Less distortion
C. Provide adequate bulk
Answer: D. Superior marginal adaptation
46. The chamfer finish line is used in:
Answer: A. Lingual surface of metal ceramic crown
B. Facial surface of metal ceramic crown
C. Facial surface of porcelain jacket crown
D. Lingual surface of porcelain jacket crown
47. In facial porcelain margin, the risk of fracture can be reduced by:
A. Increased axial depth upto 3 mm
Answer: B. Cavosurface margin at 90 degree
C. Margins of tooth reduction at incisal edge
D. Providing contact during centric relationship
48. Shoulder with bevel margin is indicated for:
Answer: A. facial margin of posterior metal ceramic crowns with supragingival margins
B. facial margin of posterior metal ceramic crowns with deep sub gingival margins
C. Cast metal restorations on the posterior teeth
D. Facial margin of a maxillary partial veneer crown
49. Finish line prepared in full veneer crown is:
A. Buccal shoulder and lingually chamfer
B. Lingually shoulder and bucally chamfer
C. All shoulder
Answer: D. All chamfer