# Reinforcement of the Maxillary First Premolar With Bayonet-Shaped Radicular Anatomy: A Challenging Case

## TL;DR

A unique dental case involving a maxillary premolar with complex canal anatomy is described, focusing on challenges and a novel reinforcement technique before crown placement.

## Contribution

A novel technique is introduced for post-endodontic reinforcement of a tooth with bayonet-shaped canals.

## Key findings

- Bayonet-shaped canals increase risks of file breakage and iatrogenic errors during endodontic treatment.
- A novel technique was used to restore a maxillary first premolar with complex canal anatomy.
- Precise restoration is challenging in S-shaped canals with double curvature.

## Abstract

This is a unique case of a single-rooted maxillary premolar with two separate canals in bayonet or S-shaped radicular anatomy undergoing post-endodontic reinforcement prior to crown placement. Bayonet-shaped canals present challenges in canal negotiation, cleaning, shaping, and obturation. The complexity of these canals heightens the risk of accidental file breakage and other iatrogenic errors, posing significant challenges. Post-endodontic restoration in S-shaped canals with double curvature poses challenges in precise placement and material adaptation. A novel technique was implicated to preserve the functionality and structural aesthetics of a decayed maxillary first premolar tooth.