Tooth resorptions occur when a portion of a tooth's crown or root deteriorates. This deterioration can start deep within the tooth and work its way outwards. The process can also start from the outside of the tooth and work its way deeper into the tooth. Quite often, where one tooth resorption is found, there are others.
At various stages of this process, resorptive teeth can be extremely painful and become an area of localized infection. Finding and treating such teeth starts with a detailed exam while a patient is under anesthesia and intraoral radiographs.
The images below offer examples of how a normal tooth compares to how a resorptive tooth can appear.