preservation of second molar tooth with extensive distal root resorption due to third molar tooth pressure: a case report

This article presents a case of extensive external root resorption (err) involving the distal root of the left mandibular second molar due to the pressure of wisdom tooth in its neighborhood in a 32 year‑old female patient. clinical and radiographic examination revealed no pulp in respond to the vitality test, periapical radiolucency in the apical of the mesial root, and root resorption of the distal root. a definite diagnosis of pulpal necrosis with chronic apical periodontitis and err of the distal root was made. the tooth was managed by nonsurgical endodontic treatment. one‑year follow‑up revealed satisfactory results clinically and radiographically.