What is Internal Resorption of a Tooth?

Internal resorption of a tooth is a pathologic process that results in the loss of hard tissue, such as dentin, cementum, or bone.  Internal resorption occurs within the root canal space and is an inflammatory condition within the pulp tissue.  Patients typically have no pain, and are asymptomatic.  Internal resorption is usually found during recall exams or routine radiographic examinations.  Clinically, a tooth may appear pink.  This is due to the loss of dentin creating a large pulp space, which allows more blood vessels to fill the area and results in a pinkish hue.  Radiographically, internal resorption’s characteristic appearance includes a circular radiolucency continuous with the pulp canal space.  Although internal resorption is rare, its diagnosis and management have been a great challenge to dental practitioners since it can progress to a great extent before its detection.