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IAN Block Complications — NDEB AFK MCQ

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ModeratePain & Anxiety ControlIAN Block ComplicationsNDEB AFK

Which of the following is the most common complication of local anaesthetic injection in the pterygomandibular space?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: A — Facial nerve paralysis

Transient facial nerve (CN VII) paralysis is a recognised complication of inferior alveolar nerve block if the local anaesthetic is deposited too posteriorly, into or near the parotid gland. This causes temporary paralysis of the ipsilateral facial muscles (inability to close the eye, drooping of the corner of the mouth). It is self-limiting, resolving when the anaesthetic wears off (typically 2-3 hours). Reassure the patient and protect the exposed eye from drying.

Reference: Malamed – Handbook of Local Anesthesia, 7th ed., 2020