Successful endodontic therapy requires a thorough knowledge of the root canal morphology . C shaped canal, a common root canal variation in mandibular molar are often seen in root canal form having a elongated ribbon shaped arc(C shape) that continues uninterrupted till the apex. These canals are mostly seen in mandibular second molars as an extensive complex root canal system with the presence of fins or webs that connects individual mesial and distal canals. And hence, these canals present challenge to debridement and obturation. Rotary and hand instruments assisted with sonics and ultrasonics and modified obturation techniques aid in effective management of C shaped root canals. This review is done in order to update the current knowledge about C-shaped canals. This helps in understanding C-shaped root canal morphology for proper diagnosis and successful treatment