AGD Operative and Restorative Dentistry Questions and Answers

Question 1

A 45-year-old patient presents with a large, failing amalgam restoration on tooth #30 with recurrent decay on the mesial-occlusal-distal (MOD) surfaces.
The facial and lingual cusps are undermined but intact.
The patient has a history of bruxism.
Which of the following is the most appropriate definitive restoration?

Accepted Answer

A ceramic onlay

Answer

A large MOD composite restoration

Answer

A full gold crown

Answer

A new, larger MOD amalgam restoration

Question 2

Which of the following components of a dental adhesive system is primarily responsible for dissolving the smear layer and demineralizing the enamel and dentin to create microporosities for bonding?

Accepted Answer

Acid etchant

Answer

Primer

Answer

Adhesive resin

Answer

Silane coupling agent

Question 3

When preparing a Class II slot preparation for a posterior composite restoration, which principle of cavity preparation is de-emphasized compared to a traditional amalgam preparation?

Accepted Answer

Creation of convergent occlusal walls for retention

Answer

Removal of all carious dentin

Answer

Achievement of a 90-degree cavosurface margin

Answer

Establishing adequate moisture control

Question 4

A patient presents for a routine check-up. Radiographs reveal an incipient carious lesion confined to the enamel on the distal surface of tooth #12. The patient has low caries risk and excellent oral hygiene. What is the most appropriate initial management?

Accepted Answer

Initiate topical fluoride varnish application and monitor the lesion.

Answer

Perform a Class II composite restoration immediately.

Answer

Place a preventive resin restoration (sealant).

Answer

Prescribe a high-fluoride toothpaste and restore in six months.

Question 5

The 'C-factor' (Configuration factor) in operative dentistry is a ratio of bonded to unbonded surfaces in a cavity preparation. Which of the following preparation types has the highest C-factor, increasing the risk of polymerization shrinkage stress?

Accepted Answer

Class I

Answer

Class IV

Answer

Class III

Answer

Class V

Question 6

Which of the following materials is classified as a glass ionomer but has been modified with the addition of a resin component to improve its physical properties and allow for light-curing?

Accepted Answer

Resin-modified glass ionomer (RMGI)

Answer

Traditional glass ionomer

Answer

Compomer

Answer

Giomer