Assisting with Restorative and Prosthodontic Procedures Flashcards

What is the primary purpose of a dental matrix band during an amalgam restoration?

Answer: To provide a temporary wall replacing missing tooth structure

A matrix band creates a temporary wall that replaces missing tooth structure so filling material can be condensed and shaped properly.

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

Answer: Amalgam condenser (plugger)

An amalgam condenser (plugger) is specifically designed to pack amalgam firmly into the cavity preparation to eliminate voids.

What is the purpose of acid etching a tooth surface before placing a composite resin restoration?

Answer: To create micro-irregularities for improved bonding

Acid etching creates microscopic irregularities on the enamel surface that increase surface area and improve adhesive bonding of composite resin.

A dental carver is used during amalgam restorations to:

Answer: Remove excess amalgam and sculpt natural tooth anatomy

Carvers remove excess amalgam and reproduce natural tooth anatomy (cusps, fossae, marginal ridges) while the material is still in its working phase.

Which prosthodontic restoration covers one or more cusps and the occlusal surface of a posterior tooth?

Answer: Onlay

An onlay covers one or more cusps and the occlusal surface, whereas an inlay fits entirely within the cusps without covering them.

What is the primary function of a dental dam during restorative procedures?

Answer: To isolate the tooth and maintain a dry operating field

A dental dam isolates the treatment area from saliva and moisture, providing a clean, dry field essential for bonding and amalgam procedures.