I have had an periapical abscess under my wisdom tooth for two months and am on the waiting list for extraction at the local oral surgery department. The infection improves sometimes and flares up at others and I have had a few antibiotic courses. I now have pain when the tooth is pressed and what is probably a sinus to the gum (some swelling near that tooth). When the tooth is extracted, will the surgeon drain the abscess under the root or will that clear by itself once the extraction is done?