Retreatment of Tooth #16 Performed with the RISING System: A Case Report

Introduction Endodontic retreatment aims to eliminate persistent infection and re-establish proper cleaning, shaping, and sealing of the root canal system. Modern NiTi rotary systems with advanced metallurgy and variable cross-sections have made retreatment procedures safer and more predictable. The RISING system (Fanta Dental Materials, Shanghai, China) was designed to optimize flexibility, cutting efficiency, and apical control during both primary and secondary treatments. Case Report A 42-year-old male patient presented with pain and tenderness on the upper right posterior region. Clinical and radiographic examination revealed tooth #16 with an inadequate previous root canal treatment and periapical radiolucency involving the mesiobuccal and palatal roots. The diagnosis was chronic apical periodontitis, and nonsurgical retreatment was planned. After rubber dam isolation, the coronal restoration…