EFDA - Expanded Function Dental Auxiliary Amalgam and Composite Restorations Questions and Answers

Question 1

A patient requires a restoration on a posterior tooth with heavy occlusal forces.
Which of the following materials is generally considered to have superior durability and longevity in such a high-stress area?

Accepted Answer

Amalgam

Answer

Glass ionomer

Answer

Composite resin

Answer

Resin-modified glass ionomer

Question 2

When placing a composite restoration, what is the primary purpose of applying the material in small increments of 2mm or less?

Accepted Answer

To minimize polymerization shrinkage and associated stress on the tooth.

Answer

To ensure a more accurate shade match with the natural tooth.

Answer

To speed up the overall procedure time.

Answer

To increase the final compressive strength of the restoration.

Question 3

An EFDA is tasked with finishing and polishing a newly placed Class II amalgam restoration. Which of the following is a critical objective of this procedure?

Accepted Answer

To create a smooth, continuous margin that reduces plaque accumulation and prevents corrosion.

Answer

To lighten the color of the amalgam to match the tooth.

Answer

To remove the smear layer from the dentin.

Answer

To increase the mercury content at the surface for added strength.

Question 4

During the placement of a Class III composite on an anterior tooth, the EFDA notices that maintaining a dry field is extremely difficult due to gingival bleeding. What is the most likely consequence if moisture contaminates the preparation?

Accepted Answer

A significant decrease in bond strength, potentially leading to restoration failure.

Answer

The final restoration will have a darker shade than intended.

Answer

The composite material will not polymerize when light-cured.

Answer

The procedure will be more comfortable for the patient.

Question 5

Which of the following is a significant advantage of using composite resin for a restoration compared to amalgam?

Accepted Answer

It requires less removal of healthy tooth structure.

Answer

It is less expensive and quicker to place.

Answer

It is more resistant to fracture in large restorations.

Answer

It is not sensitive to moisture during placement.

Question 6

An EFDA is assisting with a composite restoration. The dentist asks for the curing light. Which technique is considered best practice for light curing?

Accepted Answer

Positioning the light tip as close as possible and perpendicular to the composite surface.

Answer

Holding the light tip 5-10 mm away from the composite to cure a wider area.

Answer

Moving the light in a sweeping motion to cover all surfaces evenly.

Answer

Curing the entire restoration in a single 10-second interval, regardless of depth.

A patient requires a restoration on a posterior tooth with heavy occlusal forces.Which of the following materials is generally considered to have superior durability and longevity in such a high-stress area?

A patient requires a restoration on a posterior tooth with heavy occlusal forces.
Which of the following materials is generally considered to have superior durability and longevity in such a high-stress area?