When does a wisdom tooth extraction scab come out?

Sloughing scab: If the wound was sutured closed then surface wound should not really scab significantly and "come off" after about 5 days. For a non-filled, non-closed extraction socket, without premature disruption, after about 7-14 days. Premature loss of blood clot can result in "dry socket".

6-8 weeks: It generally takes 6-8 weeks for most of the healing to occur after an extraction. The clot (or "scab") usually only lasts a week or so until it starts turning white and the healing process progresses.

Clot: It's likely a clot. This is normal. It will take care of itself within a week. Leave it alone.