Figure 2.

Clinical and radiographic appearance of tooth resorption in the right mandibular third premolar (407). (a) There is an extensive defect at the cemento-enamel junction of the tooth. The destroyed dentine and enamel have been replaced by connective tissue in this late-stage lesion. (b) Radiography reveals that both roots of the tooth show evidence of extensive resorption – note the loss of a distinct periodontal ligament space, replacement of tooth substance by bone-like material in the distal root, and destruction of most of the crown dentine. This tooth requires treatment