Abstract
Separation and removal of a root along with the overlying part of a multi-rooted tooth is called tooth hemisection. This procedure is mainly performed to conserve natural dentition as well as the teeth which would act as a key prosthetic abutment. After endodontic treatment, extracting the defective part, whether mesial or distal roots, and leaving the remaining sound roots is the main aim of hemisection. Though hemisection is well-recognized and described in several publications, restoration of the resected molar is still subject to discussion and investigation. Restoration should allow patients to maintain the extracted site, as well as the forces to be directed along the remaining roots. In this case report, advanced periodontal lesion extending to the apical part of the distal root was observed at the right mandibular first molar. Firstly, endodontic treatment was carried out, followed by periodontal treatment - including hemisection. The hemisected tooth was restored by fixed partial denture with premolars as abutments. Hemisection can be successful if a proper case selection is done. Success of hemisection depends on the quality and quantity of the bone around the remaining roots, on a proper prosthetic plan for orienting the forces along the remaining roots, as well as on an adequate maintenance.