Oral and Maxillofacial Surgery Flashcards
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Read the first 7 Oral and Maxillofacial Surgery flashcards as text
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?
Answer: Lingual nerve
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.
The Pell and Gregory classification of impacted mandibular third molars is based on which two factors?
Answer: Relation to the anterior ramus border and depth relative to the occlusal plane
Pell and Gregory classifies by ramus relationship (Class 1-3) and depth relative to the occlusal plane (Position A-C).
Alveolar osteitis (dry socket) typically presents with severe pain beginning at what time after extraction?
Answer: 3 to 5 days
Dry socket results from early clot breakdown and classically produces radiating pain 3-5 days postoperatively.
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?
Answer: Protect the clot and give sinus precautions; it usually heals spontaneously
Small communications under 2 mm typically close on their own when the clot is preserved and sinus precautions are followed.
On a panoramic radiograph, which sign most strongly suggests close proximity of a third molar root to the inferior alveolar canal?
Answer: Darkening of the root where the canal crosses it
Root darkening, interruption of the canal's white lines, and canal diversion are the classic high-risk signs of nerve proximity.
Excluding third molars, which tooth is most frequently impacted?
Answer: Maxillary canine
Maxillary canines are the most commonly impacted teeth after third molars.
A Cryer (triangular) elevator is most useful in which situation?
Answer: Removing a remaining root by engaging the adjacent empty socket
The triangular tip is placed in the empty socket of one root and rotated to engage and lift the remaining root through interseptal bone.
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