DDS Practice 5

Question 1

A patient presents with a buccal space abscess originating from a maxillary first molar. Which structure must the infection perforate to reach the buccal space?

Accepted Answer

Buccinator muscle

Answer

The buccal space lies superficial to the buccinator muscle, so infection from the maxillary molar must penetrate the buccinator to reach this space.

Question 2

When is it appropriate to use a rubber dam during endodontic treatment?

Accepted Answer

For all routine root canal procedures to prevent contamination

Answer

Rubber dam isolation is mandatory for all root canal procedures to prevent microbial contamination of the canal system and protect the patient from aspiration.

Question 3

A patient has a Kennedy Class II removable partial denture. Which design feature must be incorporated to prevent rotation of the prosthesis during function?

Accepted Answer

Indirect retainers

Answer

Indirect retainers placed anterior to the fulcrum line prevent the distal extension base from tipping or rotating away from the tissue when occlusal force is applied.

Question 4

A patient with poorly controlled type 2 diabetes presents for a full-mouth debridement. Which laboratory value is most useful for assessing long-term glycemic control?

Accepted Answer

HbA1c (glycated hemoglobin)

Answer

HbA1c reflects average blood glucose over the preceding 2–3 months and is the best indicator of long-term glycemic control.

Question 5

Which tooth movement type results in the highest rate of root resorption during orthodontic treatment?

Accepted Answer

Intrusion

Answer

Intrusion is associated with the highest risk of root resorption because it concentrates pressure at the root apex.

DDS - Doctor of Dental Surgery Practice Test

DDS - Doctor of Dental Surgery Practice Test

DDS Practice 5