Fundamentals of tooth preparation

The term "resistance form" in cavity preparation refers to:

• The shape of the cavity walls that resists dislodgment of the restoration

• The materials used to fill the cavity

• The anesthesia applied during the procedure

• The type of handpiece used in drilling

Which instrument is commonly used to remove carious dentin during cavity preparation?

• Excavator

• Condenser

• Explorer

• Burnisher

In G.V. Black's classification, which class involves caries affecting the proximal surfaces of molars and premolars?

• a) Class I

• b) Class II

• c) Class III

• d) Class IV

Which of the following materials is commonly used as a matrix system during amalgam cavity preparation?

• a) Dental amalgam

• b) Mylar strip

• c) Rubber dam

• d) Tofflemire matrix

What should be depth of cavity for amalgam cavity preparation?

• 1-2 mm

• 0.5- 1 mm

• 1.5 - 2 mm

• 2- 3 mm

What is the head length of 245 bur?

• 1.5 mm

• 2 mm

• 3 mm

• 2.5 mm

what is the tip diameter of 245 bur?

• 1.5 mm

• 0.8 mm

• 0.6 mm

• 2 mm

Which of the following is NOT a step in cavity preparation?

• a) Cleaning the tooth surface

• b) Applying cavity varnish

• c) Establishing outline form

• d) Creating retention form

The term "cavosurface angle" refers to:

• a) The angle between the external tooth surface and the cavity preparation

• b) The angle between the explorer and the tooth surface

• c) The angle between the condenser and the tooth surface

• d) The angle between the rubber dam and the tooth surface

which of the following is not a Class 1 cavity preparation

• occlusal surfaces of premolars and molars

• occlusal two-thirds of facial and lingual surfaces

• gingival third of facial or lingual surfaces

• lingual surfaces of maxillary incisors