Can a gum fistula be treated by a periodontist using an needle injection to rid an infection along with an oral prescription without the need to use a scapel?

Sometimes: That can work if it is a shallow infection from food or debris being trapped. If it is a tooth infection either a root canal or root surgery may be necessary.

Neither: An oral fistula has to be treated based on its cause. The most common cause is a n abscesses tooth. A fistula is a tract coming from an abscess. Treat the cause of the abscess and the fistula wii clear up. Treatment of dental abscesses is root canal or extraction. Other fistula causes require different treatments. See your dentist!

Not likely: All depends on location, severity and cause. If it is an endodontic problem (root canal cause) then probable tx without scalpel. If it is a periodontal (gum tissue / bone) cause, then surgery likely.

Possibly: If the infection is periodontal in nature, it can be treated via injection of local anesthesia and root planing/scaling. However, the presence of a 'gum fistula' suggests that the source of the infection is inside the tooth (the nerve). If true, the tooth must be entered to remove the infected contents, or it must be removed.

Not usually: The fistula is just the draining point of an infection that is coming from somewhere else. Get a thorough evaluation to see what the source is, i.e. Gum infection or dying tooth (root canal time).