Free EFDA Restorative & Prosthodontic Procedures Questions and Answers

Question 1

What is the primary purpose of a dental dam in restorative procedures?

Accepted Answer

To isolate the tooth and protect adjacent tissues

Answer

The primary purpose of a dental dam in restorative procedures is to isolate the tooth being worked on from the rest of the oral cavity. This isolation keeps the operating field dry and free from saliva and blood, while also protecting adjacent soft tissues like the tongue, cheeks, and gums from instruments and materials. It creates a clean and safe environment for optimal treatment.

Question 2

Which material is most commonly used for temporary crowns?

Accepted Answer

Acrylic resin

Answer

Acrylic resin is the most commonly used material for temporary crowns due to its ease of manipulation, relatively low cost, and ability to be quickly fabricated chairside. It provides adequate strength and esthetics for short-term use while a permanent crown is being made. Other materials like gold, porcelain, and zirconia are typically used for permanent restorations.

Question 3

What is the correct sequence for placing a composite restoration?

Accepted Answer

Etch, rinse, bond, place composite, cure

Answer

The correct sequence for placing a composite restoration begins with etching the tooth surface to create microscopic porosities for mechanical retention. This is followed by rinsing to remove the etchant, then applying a bonding agent to create a strong adhesive layer. Finally, the composite material is placed and then light-cured to harden it.

Question 4

Why is proper matrix band placement critical in Class II restorations?

Accepted Answer

To ensure proper contact and contour with adjacent teeth

Answer

In Class II restorations, which involve the proximal surfaces of posterior teeth, proper matrix band placement is critical for establishing the correct anatomical form. The matrix band acts as a temporary wall, allowing the restorative material to be condensed against it, thereby ensuring proper contact with the adjacent tooth and recreating the natural contour. This prevents food impaction and promotes periodontal health.

Question 5

Which instrument is used to check occlusal contacts after crown placement?

Accepted Answer

Articulating paper

Answer

Articulating paper is a thin, colored paper used to mark areas of premature or excessive contact between opposing teeth, especially after placing a new restoration like a crown. When the patient bites down on the paper, it leaves a colored mark on the high spots, guiding the dentist to adjust the occlusion for proper bite and comfort. This ensures the restoration integrates correctly with the patient's natural bite.

EFDA - Expanded Function Dental Assistant Certification Practice Test

EFDA - Expanded Function Dental Assistant Certification Practice Test

Free EFDA Restorative & Prosthodontic Procedures Questions and Answers