Free RDA Dental Instruments and Tray Setups Questions and Answers

Question 1

Which instrument is used to carve the occlusal anatomy into a fresh amalgam restoration?

Accepted Answer

Discoid-cleoid carver

Answer

The discoid-cleoid carver is a double-ended instrument specifically designed for carving occlusal anatomy. The discoid (disc-shaped) end is used for carving and shaping larger surfaces, while the cleoid (claw-like) end is used for defining grooves and fossae.

Question 2

What are the three instruments that comprise the 'basic setup' for most dental procedures?

Accepted Answer

Mouth mirror, explorer, cotton pliers

Answer

The basic setup, also known as the examination setup, consists of the mouth mirror, explorer, and cotton pliers. These three instruments are fundamental for nearly every dental procedure, used for visualization, examination of teeth for decay, and handling small items.

Question 3

Which hand instrument is used to place and shape composite resin material into a cavity preparation?

Accepted Answer

Plastic filling instrument

Answer

A plastic filling instrument, often made of coated metal or plastic, is used to place, condense, and shape composite materials. Its material prevents the sticky composite resin from adhering to the instrument surface, allowing for smooth manipulation.

Question 4

On a pre-set tray, instruments are typically arranged from left to right in what order?

Accepted Answer

Order of use

Answer

Instruments on a tray are arranged in the sequence they will be used by the dentist. This ergonomic setup allows the dental assistant to pass instruments efficiently without having to search for the next one, improving the workflow of the procedure.

Question 5

The instrument with a small, spoon-shaped working end used to remove soft carious dentin is the:

Accepted Answer

Spoon excavator

Answer

The spoon excavator is designed specifically for the removal of soft, decayed dentin from the cavity preparation. Its sharp, spoon-like edges allow the dentist to gently scoop out the caries without removing healthy tooth structure.

(RDA) Registered Dental Assistant Practice Test

(RDA) Registered Dental Assistant Practice Test

Free RDA Dental Instruments and Tray Setups Questions and Answers