Restorative Dentistry Sample Exam

RESTORATIVE DENTISTRY 1. Etchant removes the _____ layer in preparation for bonding. a. Varnish b. Cavity liner c. Smear d. Sclerosed 2. Principles of cavity preparation according to G.V. Black include the following EXCEPT a. Biologic b. Mechanical c. Esthetic d. None of the above 3. Shape of the boundaries of the completed cavity preparation: a. Retention form b. Resistance form c. Outline form d. Convenience form 4. In tooth preparation, all friable or unsupported enamel should be preserved and supported with base material. This is for the principle of tooth preservation. a. True b. False 5. Design features in the cavity preparation which allows tooth and restoration to resist masticatory stresses without fracture: a. Retention form b. Resistance form c. Outline form d. Convenience form 6. For amalgam restorations, cavosurface margins should have a slight bevel to better facilitate condensation and burnishing. a. True b. False 7. Design features in the cavity preparation which allows it to resist dislodgement of the restoration: a. Retention form b. Resistance form c. Outline form d. Convenience form 8. Features in the prepared cavity which improves visibility and accessibility during preparation and restoration: a. Retention form b. Resistance form c. Outline form d. Convenience form 9. In amalgam restorations, the best method to achieve retention form: a. Buccal and lingual extention b. Pins and slots c. Lateral retention d. Pulpo-occlusal convergence of walls e. Occluso-pulpal convergence of walls 10. Preparations on the incisal edges of anterior teeth and cusp tips of posterior teeth without involving any other surface: a. Class I b. Class II c. Class III d. Class IV e. Class V f. Class VI 11. Lesions involving all proximal surfaces of anterior teeth with incisal edge involvement: a. Class I b. Class II c. Class III d. Class IV e. Class V f. Class VI 12. Part of the hand instrument used as a handle, is straight and usually without variations in size: a. Shank b. Shaft c. Blade d. Cutting edge 13. Part of the hand instrument where any angulation of the instrument can be placed: a. Shank b. Shaft c. Blade d. Cutting edge 14. In the instrument formula, the second number denotes: a. Width of the blade b. Primary cutting edge angle c. Blade length d. Blade angle e. None of the above 15. Amalgam carver that is round on one side, and leaf-shaped on the other: a. Hollenback b. Cleoid-discoid c. Frahm’s d. None of the above 16. Primary cutting edge of the blade is perpendicular to the axis of the handle: a. Hatchet b. Angle former c. Hoe d. Gingival margin trimmer 17. Used for sharpening line angles and creating retentive features in dentin in preparation for gold restorations: a. Hatchet b. Angle former c. Hoe d. Gingival margin trimmer 18. Grasp that permits the greatest delicacy of touch: a. Pen grasp b. Modified pen grasp c. Inverted pen grasp d. Palm and thumb grasp e. Modified palm and thumb grasp 19. Which will produce the smoothest amalgam surface and therefor would be the last polishing instrument among the following? a. Finishing burs b. Green carrot stone c. White carrot stone d. Greenie point e. Brownie point 20. The term < total-etch= means: a. Simultaneously etching dentin and enamel b. Removing all calcium and leaving only naked collagen c. The optimal etch of a given surface d. Product where acid, primer and bonding resin are all combined e. Product where acid and primer are combined 21. What material is a low strength base, used as a temporary cement, and has a sedative effect on the pulp? a. Zinc phosphate b. Polycarboxylate c. Calcium hydroxide d. Zinc oxide eugenol 22. What material seals dentin tubules, has low solubility, protects against microleakage, and is only used in amalgam restorations? a. Varnish b. Calcium hydroxide c. Reinforced zinc eugenol d. Zinc oxide eugenol 23. What material improves the wettability of the prep and penetrates dentin tubules? a. Calcium hydroxide b. Acid etchant c. Primer d. Varnish 24. Incisal third of a central incisor is lighter and more opaque than the cervical third. a. True b. False 25. What process improves the retention of the restoration and removes the smear layer from prep to allow for penetration of bonding agent into dentin? a. Bond b. Primer c. Acid etching d. None of the above 26. Bevelled conventional cavity preparations for composite restorations are indicated for Class I and II caries lesions. a. True b. False 27. What protects pulp and provides mechanical support for a restoration? a. Cavity varnish b. Cavity liner c. Cement bases d. Calcium hydroxide 28. Isolation of the operating site includes the following materials EXCEPT: a. Rubber dam b. Cotton rolls c. Retraction cord d. None of the above 29. Contraindications of composite restorations include the following EXCEPT: a. Heavy occlusal stress b. Poor oral hygiene c. Composite resin sensitivity d. Class V caries lesions e. None of the above 30. Amalgam and composite restorations are similar in the waiting time before polishing. a. True b. False 31. For composite restorations, when only the proximal surface has caries, the cavity preparation must be extended to the occlusal surface for prevention of future caries recurrence. a. True b. False 32. Restoration that covers one or more cusp and adjoining occlusal surface of the tooth: a. Inlay b. Onlay c. Crown d. Jacket e. None of the above 33. Disadvantages of indirect restoration are the following EXCEPT: a. Number of appointment b. Higher chair time c. Not biocompatible d. Technique sensitive e. Cost 34. Walls of the inlay preparation should be diverging occluso-pulpally to maximize retention form. a. True b. False 35. Indirect restorations have butt-joint margins to prevent fracture of restoration at the margins. a. True b. False 36. Functional cusp reduction at minimum should be: a. 1.0mm b. 1.5mm c. 2.0mm d. 2.5mm 37. Non-functional cusp reduction at minimum should be: a. 1.0mm b. 1.5mm c. 2.0mm d. 2.5mm 38. The main advantage in developing high copper amalgam alloy is: a. Elimination of gamma-1 phase b. Increase the strength of amalgam c. Decrease the flow value of amalgam d. Elimination of gamma-2 phase 39. G.V. Black concluded that the following areas on tooth surface are relatively not self-cleansable: a. Pits and fissures b. Tips and cusps c. Crest of marginal ridges d. All inclined planes of cusps and ridges e. None of the above 40. Pits and fissure sealants are usually derived from: a. BIS-GMA resin b. Zinc phosphate 41. 42. 43. 44. 45. 46. 47. c. Ataconic acid d. None of the above Instruments used for handling resins are made of: a. Stainless steel b. Carbon steel c. Teflon-coated metal d. Platinum e. Gold The ideal amount of dentin required between an amalgam restoration and the pulp for insulation is: a. 0.5mm b. 1.0mm c. 1.5mm d. 2.0mm Which phase of the amalgam reaction is prone to corrosion in clinical restorations? a. Gamma b. Gamma-1 c. Gamma-2 d. Gamma-3 Which tooth requires special attention when preparing the occlusal aspect for a restoration? a. Mandibular first premolar b. Mandibular second premolar c. Maxillary first molar d. Maxillary first premolar When removing caries, which of the following layers of dentin is affected but not infected, and therefore does not need to be removed? a. Turbid dentin b. Infected dentin c. Transparent dentin d. Normal dentin e. Subtransparent dentin Chronic caries is characterized by which of the following? a. Pain is common b. Slowly progressing or arrested c. Entrance to the lesion is small d. Lesion is deep and narrow Caries initiation requires the following EXCEPT: a. Host b. Bacteria c. Carbohydrates d. Saliva e. Time 48. Streptococcus mutans are ________ and therefore _________. a. Acidogenic, cariogenic b. Aciduric, cariostatic c. Acidogenic, cariostatic d. Aciduric, cariogenic 49. When restoring a darker shade of composite: a. UV light is better than visible light b. Light source must be 2mm away from the resin or mor c. Curing time is longer than normal d. Darker shades have less chemical bonding 50. Current monomers for composite resins include the following EXCEPT: a. BIS-GMA b. PMMA c. UEDMA d. TEGDMA 51. The restorative material that has the lowest thermal conductivity and diffusivity: a. Amalgam b. Gold c. Unfilled resin d. Filled resin 01C 02D 03C 04B 05B 06B 07A 08D 09D 10F 11D 12B 13A 14B 15B 16C 17B 18B 19D 20A 21D 22A 23C 24B 25C 26B 27C 28D 29D 30B 31B 32B 33C 34B 35B 36B 37A 38D 39A 40A 41C 42D 43C 44A 45C 46B 47D 48A 49C 50B 51C