MDS PREP

Which of the following is not a principle in obtaining resistance form
1) The cavity should not extend 1/3rd to 1/4th intercuspal distance
2) The floors or planes should be at right angles to the direction of loading (masticatory forces)
3) There should be high degree of parallelism between the cavity walls
4) None of the above

Conservative Dentistry Answer: 3

Retention in class II cavities for direct gold filling is provided by
1) Converging proximal walls
2) Occlusal dovetail
3) Acute axiogingival line angles
4) All of the above

Conservative Dentistry Answer: 4

A material like amalgam with high compressive strength but low tensile strength is said to be (or) the property of the amalgam which makes it undesirable to place a bevel on cavity preparation
1) Toughness
2) Brittleness
3) Ductility
4) Malleability

Conservative Dentistry Answer: 2

Annealing of gold foil is the process by which
1) Contaminants are removed from the surface
2) Rigidity decreases and ductility increases
3) Both ductility and propotional limit decrease
4) None of the above

Conservative Dentistry Answer: 1

The factor which is most important for selection of the materials for class V restorations on posterior teeth
1) Aesthetics
2) Reaction of the gingival tissue
3) Strength
4) Pulpal reaction

Conservative Dentistry Answer: 1

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 Dentistry Answer: 2

The main cause for delayed expansion in amalgam is
1) Amalgam coming in contact with moisture
2) Production of hydrogen and its accumulation
3) Sulphides released at margins
4) Presence of zinc in the amalgam

Conservative Dentistry Answer: 2

MDS PREP

Retention in class II cavities for direct gold filling is provided by
1) Converging proximal walls
2) Occlusal dovetail
3) Acute axiogingival line angles
4) All of the above

A material like amalgam with high compressive strength but low tensile strength is said to be (or) the property of the amalgam which makes it undesirable to place a bevel on cavity preparation
1) Toughness
2) Brittleness
3) Ductility
4) Malleability

Annealing of gold foil is the process by which
1) Contaminants are removed from the surface
2) Rigidity decreases and ductility increases
3) Both ductility and propotional limit decrease
4) None of the above

The factor which is most important for selection of the materials for class V restorations on posterior teeth
1) Aesthetics
2) Reaction of the gingival tissue
3) Strength
4) Pulpal reaction

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

The main cause for delayed expansion in amalgam is
1) Amalgam coming in contact with moisture
2) Production of hydrogen and its accumulation
3) Sulphides released at margins
4) Presence of zinc in the amalgam

When using compositess with an acid etching technique the enamel margins should be
1) Rounded
2) Butted
3) Acute angles
4) Obtuse angles

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MDS PREP

Retention in class II cavities for direct gold filling is provided by1) Converging proximal walls2) Occlusal dovetail3) Acute axiogingival line angles4) All of the above

A material like amalgam with high compressive strength but low tensile strength is said to be (or) the property of the amalgam which makes it undesirable to place a bevel on cavity preparation1) Toughness2) Brittleness3) Ductility4) Malleability

Annealing of gold foil is the process by which1) Contaminants are removed from the surface2) Rigidity decreases and ductility increases3) Both ductility and propotional limit decrease4) None of the above

The factor which is most important for selection of the materials for class V restorations on posterior teeth1) Aesthetics2) Reaction of the gingival tissue3) Strength4) Pulpal reaction

A bevel in the gingival region for a class II amalgam restoration is placed mainly for1) Retention form2) Resistance form3) Convenience form4) Aesthetic form

The main cause for delayed expansion in amalgam is1) Amalgam coming in contact with moisture2) Production of hydrogen and its accumulation3) Sulphides released at margins4) Presence of zinc in the amalgam

When using compositess with an acid etching technique the enamel margins should be1) Rounded 2) Butted 3) Acute angles4) Obtuse angles

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Retention in class II cavities for direct gold filling is provided by
1) Converging proximal walls
2) Occlusal dovetail
3) Acute axiogingival line angles
4) All of the above

A material like amalgam with high compressive strength but low tensile strength is said to be (or) the property of the amalgam which makes it undesirable to place a bevel on cavity preparation
1) Toughness
2) Brittleness
3) Ductility
4) Malleability

Annealing of gold foil is the process by which
1) Contaminants are removed from the surface
2) Rigidity decreases and ductility increases
3) Both ductility and propotional limit decrease
4) None of the above

The factor which is most important for selection of the materials for class V restorations on posterior teeth
1) Aesthetics
2) Reaction of the gingival tissue
3) Strength
4) Pulpal reaction

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

The main cause for delayed expansion in amalgam is
1) Amalgam coming in contact with moisture
2) Production of hydrogen and its accumulation
3) Sulphides released at margins
4) Presence of zinc in the amalgam

When using compositess with an acid etching technique the enamel margins should be
1) Rounded
2) Butted
3) Acute angles
4) Obtuse angles