Which of the following describes requirements of a sprue? 1) To be as long as possible in order to speed the flow of gold into the mold cavity 2) To be smooth with no sharp corners, and to found into the thickest portion of the wax pattern 3) Both of the above 4) None of the above
Conservative DentistryAnswer: 2
A bevel in the gingival region for a class II amalgam restoration is placed mainly for 1) Retention form 2) Resistance form 3) Convenience form 4) Aesthetic form
Conservative DentistryAnswer: 2
Short bevel extends 1) In almost 2/3 of the enamel 2) All of the enamel and half of the dentin 3) All of the enamel only 4) 1/3 of the enamel
Conservative DentistryAnswer: 3
When using compositess with an acid etching technique the enamel margins should be 1) Rounded 2) Butted 3) Acute angles 4) Obtuse angles
Conservative DentistryAnswer: 4
The main purpose of a gingival bevel in an inlay or onlay is 1) Improves the retention form of the cavity 2) Improves the resistance for of the cavity 3) Removes unsupported enamel and compensates for the casting shrinkage 4) Improves the aesthetics of the restoration
Conservative DentistryAnswer: 3
Gingival irritation is least with 1) Glazed porcelain 2) Glazed composites 3) Polished gold restoration 4) Polished amalgam
Conservative DentistryAnswer: 1
In which of the condition "PIGGY BACK" wedging is indicated? 1) Proximal caries with gingival recession 2) Tooth with fluted surface 3) Class II with wide proximal box 4) Narrow class II cavity
Conservative DentistryAnswer: 1
Initial marginal adaptation is best for the following materials 1) Amalgam 2) Acid etched composites 3) Glass ionomer 4) Unfilled resins
