# The “C” in Complexity: A Case Series on Navigating Fan’s Classification of C-shaped Canals

## TL;DR

This paper presents four cases of complex C-shaped canals in molars and shows how they were successfully treated using specific protocols.

## Contribution

The novelty lies in demonstrating successful clinical management of C-shaped canals using Fan's Classification and modified obturation techniques.

## Key findings

- C-shaped canals in mandibular second molars were successfully navigated using Fan's Classification.
- Modified obturation techniques improved outcomes in complex canal anatomy.
- Radiographic and clinical diagnosis helped identify and treat fan-shaped regions and anastomoses.

## Abstract

C-shaped canal anatomy is most commonly found in mandibular second molars. The complex anatomy can be challenging to the clinician during negotiation, debridement, and obturation. The fan-shaped regions, transverse anastomoses, fins, and webs of the C-shaped anatomy can be identified and treated with the help of radiographic and clinical diagnosis. Adequate knowledge of the root canal configuration is essential to achieve success in endodontic therapy. This case series highlights the management of four different cases of C-shaped canal configurations categorized on the basis of Fan's Classification. Despite the significant challenges, a positive outcome was achieved in all the cases through specific protocols and modified obturation techniques.