The main purpose of etching the enamel before placing composites 1. Increases the surface area 2000 times 2. To create surface irregularities to aid in mechanical interblocking 3. Allow proper adaptation and decrease marginal leakage 4. All of the above
Conservative DentistryAnswer: 4
Which one of the following is not used for retention of cast restorations? 1) Dove tail 2) Minimum flare of walls 3) Faciolingual grooves 4) Undermining of detinal walls
Conservative DentistryAnswer: 4
Intermediary restorations are advocated for 1) Protection of pulp, supporting the walls 2) Aesthetics 3) Maintenance of the tooth position 4) All of the above
Conservative DentistryAnswer: 4
Gingival margin in class II amalgam restoration is placed under the contact point because 1. It increases the retention of the amalgam 2. It provides enough bulk of the restoration 3. Allows proper finishing of the gingival margin 4. All of the above
Conservative DentistryAnswer: 3
Which tooth separator works on traction principle 1) Ferrior 2) Wedge 3) Elliot 4) Ivory
Conservative DentistryAnswer: 1
Matrix band is difficult to adapt on upper first premolar because of 1) Axial inclination 2) Concavity in the cervical thirds mesially 3) Concavity in the cervical thirds distally 4) Presence of buccal ridges
Conservative DentistryAnswer: 2
An irregular shaped void on the surface of cast gold restoration is 1) Fragment of investment carried into the mould space 2) Inadequate burn out the wax 3) Both of the above 4) None of the above
Conservative DentistryAnswer: 1
Surface defects in porcelain inlay should be filled before glazing to 1) Obtain good aesthetic effect 2) To obtain smooth surface 3) To obtain uniform surface glaze 4) Increase the strength of the finished restoration
