RDA Dental Instruments and Tray Setups 2

Question 1

Which instrument is used to condense (pack) amalgam into a prepared cavity?

Accepted Answer

Amalgam condenser

Answer

An amalgam condenser (plugger) is used to pack/condense amalgam into a cavity preparation, eliminating voids and adapting it to the walls.

Question 2

What is the purpose of the matrix band and retainer during an amalgam restoration?

Accepted Answer

To create a temporary wall replacing the missing tooth wall during restoration placement

Answer

A matrix band and retainer (such as the Tofflemire retainer) create a temporary interproximal wall, providing a form to condense amalgam against when one or more walls of the cavity preparation are missing.

Question 3

Which dental hand instrument has a blade used for removing soft, carious dentin?

Accepted Answer

Spoon excavator

Answer

The spoon excavator has a spoon-shaped working end used to remove soft, carious dentin from cavity preparations.

Question 4

What is the function of the periodontal probe?

Accepted Answer

Measure the depth of the gingival sulcus or periodontal pocket

Answer

The periodontal probe is a calibrated instrument used to measure the depth of the gingival sulcus or periodontal pockets in millimeters, aiding in periodontal assessment.

Question 5

Which instrument is used to carve and shape amalgam restorations to restore occlusal anatomy?

Accepted Answer

Carver

Answer

Carvers (such as the Hollenback carver or discoid/cleoid carver) are used to remove excess amalgam and shape the restoration to restore proper occlusal anatomy before the material fully hardens.

(RDA) Registered Dental Assistant Practice Test

(RDA) Registered Dental Assistant Practice Test

RDA Dental Instruments and Tray Setups 2