MDS PREP

In modified class III cavity restoration, retention is obtained mainly by

1. Acid etching
2. Retentive groove/slot
3. Retentive point
4. Retentive pin

Conservative Dentistry Answer: 1

Explanation:�In modified Class III cavity restorations,
particularly those involving composite materials, retention is often achieved
through acid etching. This process creates micro-retentive features on the
enamel and dentin surfaces, allowing the bonding agent to penetrate and create a
strong bond with the tooth structure. While retentive grooves, points, and pins
can also be used, acid etching is a fundamental technique that enhances
retention in adhesive dentistry.

Rotatory instrument that produce the roughest surface
1) Cross cut tapered fissure with high speed
2) Cross cut tapered fissure with low speed
3) Plain bur at high speeds
4) Plain round bur at low speeds

Conservative Dentistry Answer: 1

A finished and polished amalgam will
1) Tarnish with time
2) Not tarnish and corrode easily
3) Show secondary caries
4) Do none of the above

Conservative Dentistry Answer: 2

Pin retained amalgam is not used in
1) Where margins of restoration rest below the gingiva
2) Non-vital teeth
3) Hypoplastic teeth
4) Vital teeth

Conservative Dentistry Answer: 3

The main disadvantages of composites of not being recommended for class II posterior restorations
1) Colour matching is not good
2) Lacks sufficient strength
3) Occlusal wear
4) Frequent fractures at the isthmus

Conservative Dentistry Answer: 3

If a die is not seated properly in the articulator, resulting onlay will be
1) Infraocclusion and low occlusal height
2) Supraocclusion and excessive occlusal height
3) Supraocclusion and low occlusal height
4) Infraocclusion and excessive vertical height

Conservative Dentistry Answer: 2

Wedging in the interproximal areas in case of recession is called
1) Piggy back
2) Tie back
3) Tie through
4) None of the above

Conservative Dentistry Answer: 1

MDS PREP

In modified class III cavity restoration, retention is obtained mainly by

1. Acid etching
2. Retentive groove/slot
3. Retentive point
4. Retentive pin

Rotatory instrument that produce the roughest surface
1) Cross cut tapered fissure with high speed
2) Cross cut tapered fissure with low speed
3) Plain bur at high speeds
4) Plain round bur at low speeds

A finished and polished amalgam will
1) Tarnish with time
2) Not tarnish and corrode easily
3) Show secondary caries
4) Do none of the above

Pin retained amalgam is not used in
1) Where margins of restoration rest below the gingiva
2) Non-vital teeth
3) Hypoplastic teeth
4) Vital teeth

The main disadvantages of composites of not being recommended for class II posterior restorations
1) Colour matching is not good
2) Lacks sufficient strength
3) Occlusal wear
4) Frequent fractures at the isthmus

If a die is not seated properly in the articulator, resulting onlay will be
1) Infraocclusion and low occlusal height
2) Supraocclusion and excessive occlusal height
3) Supraocclusion and low occlusal height
4) Infraocclusion and excessive vertical height

Wedging in the interproximal areas in case of recession is called
1) Piggy back
2) Tie back
3) Tie through
4) None of the above

For class II amalgam preparation, axiopulpal line angle is
1. Bevelled acute angles
2. Bevelled obtuse angles
3. Right angles
4. Rounded

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MDS PREP

In modified class III cavity restoration, retention is obtained mainly by 1. Acid etching2. Retentive groove/slot3. Retentive point4. Retentive pin

Rotatory instrument that produce the roughest surface1) Cross cut tapered fissure with high speed2) Cross cut tapered fissure with low speed3) Plain bur at high speeds4) Plain round bur at low speeds

A finished and polished amalgam will1) Tarnish with time2) Not tarnish and corrode easily3) Show secondary caries4) Do none of the above

Pin retained amalgam is not used in1) Where margins of restoration rest below the gingiva2) Non-vital teeth3) Hypoplastic teeth4) Vital teeth

The main disadvantages of composites of not being recommended for class II posterior restorations1) Colour matching is not good2) Lacks sufficient strength3) Occlusal wear4) Frequent fractures at the isthmus

If a die is not seated properly in the articulator, resulting onlay will be1) Infraocclusion and low occlusal height2) Supraocclusion and excessive occlusal height3) Supraocclusion and low occlusal height4) Infraocclusion and excessive vertical height

Wedging in the interproximal areas in case of recession is called1) Piggy back2) Tie back3) Tie through4) None of the above

For class II amalgam preparation, axiopulpal line angle is 1. Bevelled acute angles 2. Bevelled obtuse angles 3. Right angles 4. Rounded

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In modified class III cavity restoration, retention is obtained mainly by

1. Acid etching
2. Retentive groove/slot
3. Retentive point
4. Retentive pin

Rotatory instrument that produce the roughest surface
1) Cross cut tapered fissure with high speed
2) Cross cut tapered fissure with low speed
3) Plain bur at high speeds
4) Plain round bur at low speeds

A finished and polished amalgam will
1) Tarnish with time
2) Not tarnish and corrode easily
3) Show secondary caries
4) Do none of the above

Pin retained amalgam is not used in
1) Where margins of restoration rest below the gingiva
2) Non-vital teeth
3) Hypoplastic teeth
4) Vital teeth

The main disadvantages of composites of not being recommended for class II posterior restorations
1) Colour matching is not good
2) Lacks sufficient strength
3) Occlusal wear
4) Frequent fractures at the isthmus

If a die is not seated properly in the articulator, resulting onlay will be
1) Infraocclusion and low occlusal height
2) Supraocclusion and excessive occlusal height
3) Supraocclusion and low occlusal height
4) Infraocclusion and excessive vertical height

Wedging in the interproximal areas in case of recession is called
1) Piggy back
2) Tie back
3) Tie through
4) None of the above

For class II amalgam preparation, axiopulpal line angle is
1. Bevelled acute angles
2. Bevelled obtuse angles
3. Right angles
4. Rounded