MFDS Head and Neck Anatomy 2

Question 1

An inferior alveolar nerve block fails to anaesthetise which structure, necessitating a separate injection?

Accepted Answer

Buccal gingiva of mandibular molars

Answer

The buccal (long buccal) nerve, a separate branch of CN V3, supplies the buccal gingiva and mucosa of the mandibular molar region and is not blocked by a standard inferior alveolar nerve block.

Question 2

Which muscle protracts the mandibular condyle during mouth opening?

Accepted Answer

Lateral pterygoid

Answer

The inferior head of the lateral pterygoid contracts during mouth opening, pulling the condyle and articular disc anteriorly (protraction), while the posterior fibres of temporalis retract the condyle on closing.

Question 3

The mylohyoid nerve, which supplies the mylohyoid muscle, arises from which parent nerve?

Accepted Answer

Inferior alveolar nerve

Answer

The mylohyoid nerve is a branch of the inferior alveolar nerve arising just before it enters the mandibular foramen; it runs in the mylohyoid groove to supply the mylohyoid muscle and the anterior belly of the digastric.

Question 4

The maxillary teeth receive their primary arterial supply from branches of which artery?

Accepted Answer

Maxillary artery

Answer

The posterior superior alveolar and anterior superior alveolar arteries, both branches of the maxillary artery, supply the maxillary teeth and their supporting structures.

Question 5

The pterygomandibular raphe serves as the key landmark for which local anaesthetic technique?

Accepted Answer

Inferior alveolar nerve block

Answer

The pterygomandibular raphe marks the medial boundary of the pterygomandibular space; the needle for an inferior alveolar nerve block is directed lateral to this raphe, towards the mandibular foramen.

MFDS Part 1 Practice Test

MFDS Part 1 Practice Test

MFDS Head and Neck Anatomy 2