RESTORATIVE BOARD EXAM QUESTIONS
1.) These are caries susceptible areas, except:
a. Pits and fissures
b. Proximal surfaces
c. Proximal line angles
d. Gingival third of the facial and lingual surfaces of teeth
Explanation: Pits and fissures, proximal surfaces, gingival third of the facial and lingual surfaces of teeth are caries susceptible areas while proximal line angles are a self-cleansable area.
2.) Resistance form
a. Is that shape and placement of cavity walls that enables the tooth to withstand stress
b. Does not utilize the box shape and flat floor
c. Utilize a rounded pulpal floor
d. None of the above
Explanation: Special attention should be paid to the enamel wall of the cavity preparation properly prepared. Enamel wall provided firm foundation.
3.) Consideration to be undertaken in the finishing of enamel walls and margins include:
a. The direction of enamel rods
b. Support of enamel rods
c. The type of restorative materials to be placed in preparation
d. The location of marginal metal that is easily burnished
e. None of the above
Explanation: The enamel walls should be first smoothed the direction of enamel rods.
4.) The cavosurface angle of amalgam cavity preparation should be:
a. Rounded
b. Beveled
c. Right angled
d. None of the above
Explanation: Beveled is the most accepted in cavosurface area because it provides most retention for filling area.
5.) A composite restoration will be compatible with:
a. Eugenol
b. Fluoride
c. Copal varnish
d. Calcium hydroxide
Explanation: Because calcium hydroxide has the component to form a reparative dentin.
Explanation: Because tin, zinc, and copper is a component of mercury and magnesium is not.
6.) Mixing time for IRM (Zinc Oxide Eugenol):
a. 2 min
b. 10 secs
c. 1 min
d. 9 secs
Explanation: 1 min is the mixing time for IRM because easily set.
7.) The filler in a composite filling material may be:
a. Quartz
b. Barium glass
c. Aluminum
d. Silane
Explanation: Silane is a couping agent
8.) Which of the following is the best choice for restoration in cementum:
a. Amalgam
b. G.I.
c. Gold restoration
d. Composite restoration
Explanation: Because it has the biocompatible capability and provide the best environment for the gums and it doesn’t make any discoloration to gums like other restoration materials as amalgam.
9.) The final step in condensation of amalgam:
a. Burnishing
b. Removal of prematurities
c. Carving
d. None of the above
Explanation: To ensure that margin of amalgam is well condensed.
10.) In a Class V preparation, the ideal internal outline from should be:
a. Uniform depth into dentin
b. Converging occlusal and gingival walls
c. Have converging mesial and distal walls
d. Have flat axial walls
Explanation: Class V cavity preparation is extending the external walls to sound tooth structure while maintaining a limited depth pulpally.
11.) Beveling of the cavosurface margin in an inlay preparation will:
a. Facilitate flushing of excess cement
b. Improve marginal adaptation
c. Increase visibility of the operating field
d. Remove undermined enamel
Explanation: To facilitate flushing of excess cement so that it will not create a bulk on the tooth.
12.) Objectives of cavity preparation are:
a. Remove all the decay
b. Give protection to the pulp
c. Locate margins of restoration in immune areas of the tooth
d. The tooth or restoration will not fracture
e. All of the above
Explanation: An inadequate extended occlusal fissure provides a common site for the attack of dental caries.
13.) This is defined as any restoration requiring the placement of one or more pins in dentin to provide adequate resistance and retention form:
a. Pin retained restoration
b. Complex amalgam restoration
c. Retained amalgam
d. Restorative pin
Explanation: Pins are used whenever adequate resistance and retention forms cannot be established with slots, locks and undercuts.
14.) The following are disadvantages of pin retained amalgam restoration except:
a. Microleakage
b. Decreased strength of amalgam
c. Dentinal microfractures
d. Resistance and retention form
Explanation: Resistance and retention forms are advantages of pin retained amalgam restoration.
15.) A V-shaped or wedge-shaped ditch gingival to the CEJ in teeth with some gingival recession is indicative of:
a. Abrasion
b. Attrition
c. Bruxism
d. External resorption
Explanation: Abrasion is pathologic wearing away of tooth structure by an external mechanical source, most commonly incorrect tooth brushing methods.
16.) A solutions of one or more resins from the natural gums, the synthetic resins and resin in an organic solvent is called a:
a. carboxylate cement
b. liner
c. cavity varnish
d. cyanoacrylate cement
Explanation: According to Wells, a cavity varnish is principally a natural gum, such as copal, resin, are a synthetic resin, dissolved in an organic solvent, such as acetone, chloroform or ether.
17.) Calcium hydroxide is regarded as a good pulp capping agent because
a. it creates a better cavity seal than other materials
b. the pulp responds by forming secondary dentin
c. its alkaline nature is non-irritating to pulp
d. it has a sedative effect on the pulp
Explanation: As Wells explained in those areas that are very near to the pulp or involve an actual pulpal exposure, CaOH is the base of choice since it acts as a mild irritant and stimulates the odontoblasts to form secondary dentin. When used in the case of a direct exposures it is referred to as a direct pulp capping.
18.) One of the best materials for pulpal sedation is:
a. ZOE
b. Cavity varnish
c. CaOH
d. Zinc phosphate cement
Explanation: It says that the ZOE cements tend to be among the best irritating and are frequently used as temporary restorations or thermoinsulating bases.
19.) Cavity varnish is describes under amalgam restorations because it:
a. eliminates the possibility of galvanic shock
b. improves the marginal seal of the restoration
c. completely seals all dentinal tubules
d. is an effective thermal insulator
Explanation: Cavity varnishes are very popular since they have been shown to improve the marginal seal of the most restorations. Under amalgam restorations they also serve to reduce tooth discoloration.
References:
Review of Basic Science and Clinical dentistry Volume 11 by Jack E. Wells
Sturdevant: Art and Science of Operative Dentistry 4th edition
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