Any pilot who has had a local anaesthetic for extensive dental procedures should not act as a flight crew member during the next
Why this is the answer
Per TC AIM-AIR (Anaesthetics), after a local anaesthetic for extensive dental work (e.g. several wisdom teeth), common sense suggests waiting at least 24 hours before flying. Minor local anaesthesia carries less risk, but extensive procedures warrant the 24-hour wait.
Reference
TC AIM-AIR – Anesthetics
Question reproduced verbatim from Transport Canada’s PSTAR Study and Reference Guide (TP 11919E). The answer key is Transport Canada’s; the explanation is ours.
A study aid — not a substitute for the official guide, the CARs, or your instructor.