Endodontics deals with diseases of the contents of the root canal, that is, dental pulp. Dental pulp can get infected for various reasons, one of which is definitely tooth decay. When bacteria and their toxins get into the tooth chamber an inflammation of the dental pulp tissue called pulpitis occurs.
Because of the effects of bacteria and their toxins the tooth is cut off from its blood supply and its root starts to rot, and that’s when gangrene sets in. Bacteria can also enter the jaw bone through the top of the tooth’s root (apex), the consequence of which is the process at the top of the root.
Trauma, such as a blow, for example, can lead to the cessation of the flow of nutritious materials to the dental pulp (the contents of the root canal), after which it starts to slowly decay. This usually remains unnoticed, so these cysts are first sighted either when they reach significant proportions or on a routine X-ray scan. If some infectious agents penetrate inside these cysts, the patient could get gangrene.