FREE NBDE Restorative Dentistry Principles Questions and Answers

Question 1

Which of the following restorative materials is known for its ability to release fluoride, making it beneficial for patients with high caries risk or in areas prone to secondary caries?

Accepted Answer

Glass Ionomer Cement

Answer

Composite Resin

Answer

Amalgam

Answer

Ceramic

Question 2

A 35-year-old patient presents with a Class II carious lesion on tooth #30. The lesion extends into dentin but does not involve the pulp. Which of the following is the most critical consideration for achieving a successful and long-lasting restoration in this scenario?

Accepted Answer

Ensuring complete removal of carious tissue

Answer

Selecting a shade that matches the adjacent teeth perfectly

Answer

Using a high-speed handpiece for cavity preparation

Answer

Applying a desensitizing agent before restoration placement

Question 3

When restoring a Class III carious lesion on a maxillary central incisor with composite resin, which technique is most crucial for achieving optimal esthetics and preventing marginal discoloration?

Accepted Answer

Utilizing an incremental layering technique

Answer

Applying a strong phosphoric acid etch for 60 seconds

Answer

Using a matrix band and wedge

Answer

Ensuring the cavity preparation extends into self-cleansing areas

Question 4

Which of the following scenarios would most appropriately indicate the use of an indirect restoration (e.g., inlay, onlay) over a direct restoration (e.g., composite filling)?

Accepted Answer

A large posterior cavity preparation with extensive cusp involvement

Answer

A small occlusal pit lesion on a premolar

Answer

A Class I lesion involving minimal tooth structure

Answer

A Class V lesion on a root surface

Question 5

What is the primary purpose of placing a dental liner or base material beneath a restorative material in a deep cavity preparation?

Accepted Answer

To provide thermal insulation to the pulp

Answer

To enhance the esthetic appearance of the restoration

Answer

To increase the bond strength of the final restorative material

Answer

To facilitate easy removal of the restoration in the future

Question 6

A patient presents with a deep Class II carious lesion on tooth #14. After caries removal, a small pulpal exposure is noted. The pulp appears vital with no signs of irreversible pulpitis. Which of the following is the most appropriate initial treatment step for this direct pulp exposure?

Accepted Answer

Place a layer of calcium hydroxide over the exposure

Answer

Immediately proceed with a root canal therapy

Answer

Restore the tooth directly with composite resin

Answer

Extract the tooth and consider an implant