DMD Oral and Maxillofacial Surgery 2

Question 1

After removal of a mandibular third molar using a lingual flap, the patient reports numbness of the anterior two-thirds of the tongue. Which nerve was most likely injured?

Accepted Answer

Lingual nerve

Answer

The lingual nerve lies close to the lingual cortex of the third molar region and supplies general sensation to the anterior two-thirds of the tongue.

Question 2

The Pell and Gregory classification of impacted mandibular third molars is based on which two factors?

Accepted Answer

Relation to the anterior ramus border and depth relative to the occlusal plane

Answer

Pell and Gregory classifies by ramus relationship (Class 1-3) and depth relative to the occlusal plane (Position A-C).

Question 3

Alveolar osteitis (dry socket) typically presents with severe pain beginning at what time after extraction?

Accepted Answer

3 to 5 days

Answer

Dry socket results from early clot breakdown and classically produces radiating pain 3-5 days postoperatively.

Question 4

An oroantral communication of about 1-2 mm is discovered after extracting a maxillary first molar in a patient with no sinus disease. What is the most appropriate management?

Accepted Answer

Protect the clot and give sinus precautions; it usually heals spontaneously

Answer

Small communications under 2 mm typically close on their own when the clot is preserved and sinus precautions are followed.

Question 5

On a panoramic radiograph, which sign most strongly suggests close proximity of a third molar root to the inferior alveolar canal?

Accepted Answer

Darkening of the root where the canal crosses it

Answer

Root darkening, interruption of the canal's white lines, and canal diversion are the classic high-risk signs of nerve proximity.

DMD - Doctor of Medicine in Dentistry Practice Test

DMD - Doctor of Medicine in Dentistry Practice Test

DMD Oral and Maxillofacial Surgery 2