RDA Dental Instruments and Tray Setups 4

Question 1

Which instrument is used to place and condense amalgam into a prepared cavity?

Accepted Answer

Amalgam condenser

Answer

An amalgam condenser (plugger) is used to pack and condense amalgam into the prepared cavity to remove voids.

Question 2

The Tofflemire matrix retainer is used in conjunction with which component to create a temporary wall during amalgam restorations?

Accepted Answer

Matrix band

Answer

The Tofflemire retainer holds the matrix band around the tooth to replace missing walls during amalgam placement.

Question 3

What is the primary purpose of a wooden wedge placed interproximally during a Class II restoration?

Accepted Answer

To separate teeth and seal the gingival margin of the matrix band

Answer

Wooden wedges are placed to adapt the matrix band tightly at the gingival margin and provide slight tooth separation.

Question 4

Which carving instrument is best suited for carving the occlusal anatomy of an amalgam restoration?

Accepted Answer

Hollenback carver

Answer

The Hollenback carver has a pointed blade ideal for carving occlusal pits, fissures, and grooves in amalgam.

Question 5

An enamel hatchet is classified as what type of cutting instrument?

Accepted Answer

Chisel

Answer

The enamel hatchet is a type of chisel with the blade set at an angle, used to cut and refine enamel walls.

(RDA) Registered Dental Assistant Practice Test