DANB CDA DANB CDA Dental Instruments and Equipment 2

Question 1

What is the function of an amalgam carrier?

Accepted Answer

To transport and dispense amalgam into the cavity

Answer

An amalgam carrier is a syringe-like instrument used to pick up freshly mixed amalgam and dispense it directly into the prepared cavity.

Question 2

Which type of matrix system is most commonly used for posterior composite restorations?

Accepted Answer

Sectional matrix system

Answer

Sectional matrix systems (such as the Composi-Tight) are preferred for posterior composites because they create tight interproximal contacts and proper contours.

Question 3

The air-water syringe in a dental unit delivers which combination?

Accepted Answer

Air, water, or a combination spray

Answer

The air-water syringe (three-way syringe) can deliver air alone, water alone, or a combined air-water spray for rinsing and drying the operative field.

Question 4

What is the purpose of a dental dam clamp?

Accepted Answer

To anchor the dental dam to the anchor tooth

Answer

A dental dam clamp (retainer) is placed on the anchor tooth (usually the most posterior tooth in the treatment area) to secure the dental dam in position.

Question 5

Which handpiece operates at speeds above 100,000 RPM?

Accepted Answer

High-speed (turbine) handpiece

Answer

The high-speed air turbine handpiece operates between 250,000–400,000 RPM and is used for cutting enamel, dentin, and removing old restorations.

DANB CDA Test Practice Test

DANB CDA Test Practice Test

DANB CDA DANB CDA Dental Instruments and Equipment 2