Hematoma formation after posterior superior alveolar nerve block

 # If hematoma formation occurs after posterior superior alveolar nerve block, it is due to the damage of:

A. Pterygoid venous plexus

B. Small capillaries and arterioles in the region

C. Facial artery

D. Internal maxillary artery

The correct answer is A. Pterygoid venous plexus.

Complications after posterior superior alveolar nerve block

1. Hematoma:

a. This is commonly produced by inserting the needle too far posteriorly into the pterygoid plexus of veins. In addition, the maxillary artery may be perforated. Use of a short needle minimizes the risk of pterygoid plexus puncture.

b. A visible intraoral hematoma develops within several minutes, usually noted in the buccal tissues of the mandibular region.

(1) There is no easily accessible intraoral area to which pressure can be applied to stop the hemorrhage.

(2) Bleeding continues until the pressure of extravascular blood is equal to or greater than that of intravascular blood.

Reference: Handbook of Local Anesthesia, Malamed, 6th Edition, Page 195

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AIIMS NOVEMBER 2015 MDS PAST ENTRANCE EXAM MCQs

# Medial dislocation of fractured condyle in subcondylar fracrure is caused by:
A. Medial pterygoid
B. Lateral pterygoid
C. Masseter
D. Buccinator

# A dental surgeon has recoverd from Hepatitis B by 3 months rest. His laboratory findings are normal but he is not allowed to attend patients as per medical board as he is:
A. healthy carrier
B. active carrier
C. convalescent carrier
D. paradoxical carrier

AIIMS NOVEMBER 2014 MDS ENTRANCE EXAM PAST QUESTIONS

# Which of the following is not seen in posterior triangle of neck:
A. Hypoglossal nerve
B. Subclavein vein
C. External jugular vein
D. Phrenic nerve

# Which of the following is derived from second brachial arch:
A. muscle of facial expression
B. masticatory muscles
C. mandible
D. condyle

The duration of fixation generally required for fracture of mandible:

 # The duration of fixation generally required for fracture of mandible:

A. 2-4 weeks

B. 3-5 weeks

C. 6-8 weeks

D. 8-10 weeks

The correct answer is C. 6-8 weeks.

In the past, one of the major considerations in the immediate postoperative period was the difficulty resulting from IMF. When  the jaws are wired together, the patient has initial difficulties in obtaining adequate nutrition, performing necessary oral hygiene, and communicating verbally. The average IMF period ranges from 6 to  8 weeks.

Reference: Contemporary Oral and Maxillofacial Surgery, James R. Hupp, 6th Edition 2013, Page No:  557

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