%0 Case Reports %T Endodontic Retreatment of a Mandibular Second Molar With a C-shaped Root Canal Configuration: A Case Report. %A Liu H %A Shen Y %J Cureus %V 16 %N 1 %D 2024 Jan %M 38389597 暂无%R 10.7759/cureus.52812 %X Root canal retreatment in mandibular second molars with C-shaped root canal configurations presents notable challenges. This article presents a case of successful root canal retreatment in a mandibular second molar exhibiting this complex configuration. Achieving a successful endodontic outcome in such cases necessitates a comprehensive understanding of the unique root canal anatomy. Moreover, the employment of advanced instruments and techniques is crucial to effectively address the intricacies of the C-shaped root canal system.