International Journal for Multidisciplinary Research (IJFMR) E-ISSN : 2582-2160 ● Website: www.ijfmr.com ● Email: editor@ijfmr.com IJFMR23011317 Volume 5, Issue 1, January-February 2023 1 Endodontic Management of C-shaped Root Canal Configuration using Different Obturation Systems: Case Series Dr. Madhuri Patil 1 , Dr. Asiya Mujawar 2 , Dr. Divya Rachalwar 3 , Dr. Samia Shaikh 4 1 Reader, Department of conservative dentistry and endodontics, MA Rangoonwala college of dental sciences and research center, Pune, Maharashtra, India 2 Senior Lecturer, Department of conservative dentistry and endodontics, MA Rangoonwala college of dental sciences and research center, Pune, Maharashtra, India 3 Reader, Department of Conservative Dentistry & Endodontics, D Y Patil Dental College, Lohegaon, Pune, Maharashtra, India 4 Post Graduate Student, Department of conservative dentistry and endodontics, MA Rangoonwala college of dental sciences and research center, Pune, Maharashtra, India Abstract C-shaped canal is one of the most difficult situations with which the dentist is confronted during endodontic treatment of teeth. Recognition of unusual variation in the canal configuration is critical because it has been established that the root with a single tapering canal and apical foramen is the exception rather than rule. The early recognition of these configurations facilitates cleaning, shaping and obturation of the root canal system. “C” configuration, which is an important anatomic variation, presents a thin fin connecting the root canals. The present case series reports the successful management of C-shaped canals in mandibular second molars using cone-beam computed tomography (CBCT), sonic irrigation activation and different thermoplasticized gutta percha obturating techniques. Keywords: C-shaped canal, Cone-beam computed tomography (CBCT), Endoactivator, Melton’s Classification, Fan’s Classification, Thermoplasticized gutta percha technique. 1. Introduction The crux of successful endodontics revolves around knowledge, respect and appreciation for root canal anatomy and careful, thoughtful, meticulously performed cleaning and shaping procedures. 1 A thorough knowledge of both normal and abnormal anatomy of the root canal system dictates the parameters for doing root canal therapy and can directly affect the outcome of endodontic therapy. One of the important anatomic variations is the “C” configuration of the canal system. The C-shaped canal, which was first documented in endodontic literature by Cooke and Cox in 1979, is so named for the cross sectional morphology of the root and root canal. 2 This C-shaped canal is an anatomical variation of a root fusion and a type of taurodontism. This results from the failure of Hertwig’s