DANB Assisting with Restorative and Prosthodontic Procedures 1 — Questions and Answers
Question 1: What is the primary purpose of a dental matrix band during an amalgam restoration?
- To provide a temporary wall replacing missing tooth structure (Correct answer)
- To mix the amalgam alloy
- To etch the tooth surface
- To apply fluoride treatment
Correct 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.
Question 2: Which instrument is used to pack and condense amalgam into a prepared cavity?
- Burnisher
- Amalgam condenser (plugger) (Correct answer)
- Hatchet
- Carver
Correct answer: Amalgam condenser (plugger)
An amalgam condenser (plugger) is specifically designed to pack amalgam firmly into the cavity preparation to eliminate voids.
Question 3: What is the purpose of acid etching a tooth surface before placing a composite resin restoration?
- To remove remaining decay
- To create micro-irregularities for improved bonding (Correct answer)
- To disinfect the tooth
- To remove fluoride from enamel
Correct 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.
Question 4: A dental carver is used during amalgam restorations to:
- Mix the amalgam alloy
- Condense the amalgam into the cavity
- Remove excess amalgam and sculpt natural tooth anatomy (Correct answer)
- Polish the final restoration
Correct 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.
Question 5: Which prosthodontic restoration covers one or more cusps and the occlusal surface of a posterior tooth?
- Full cast crown
- Onlay (Correct answer)
- Veneer
- Inlay
Correct answer: Onlay
An onlay covers one or more cusps and the occlusal surface, whereas an inlay fits entirely within the cusps without covering them.
Question 6: What is the primary function of a dental dam during restorative procedures?
- To retract the cheek and lip
- To isolate the tooth and maintain a dry operating field (Correct answer)
- To provide local anesthesia
- To mix dental restorative materials
Correct 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.
DANB Assisting with Restorative and Prosthodontic Procedures 1
What is the primary purpose of a dental matrix band during an amalgam restoration?