# Challenges Faced in Treating Maxillary Second Premolars With Three Canals: A Case Report

## TL;DR

This case report discusses the challenges of treating maxillary second premolars with three canals, emphasizing the need for advanced techniques and tools for effective root canal treatment.

## Contribution

The paper highlights the increasing recognition of three-canal anatomy in maxillary second premolars and presents updated clinical approaches for their treatment.

## Key findings

- Maxillary second premolars with three canals require meticulous debridement, shaping, and disinfection.
- Effective irrigation solutions and modern instrumentation improve cleaning of accessory canals.
- Ultrasonic and sonic activation enhance irrigant effectiveness in complex canal configurations.

## Abstract

The maxillary second premolar has long been regarded as a tooth with a straight root canal anatomy, typically featuring a single root with two canals. However, emerging evidence suggests this tooth may harbor a more intricate internal morphology, challenging conventional perceptions, and treatment approaches. One such variation is three root canals within the upper second premolar, which has been gaining increasing attention in endodontic literature. Root canal treatment of maxillary second premolars with three canals demands meticulous debridement, shaping, and disinfection. A combination of magnification, illumination, and appropriate instrumentation aids in locating, negotiating, and cleaning the accessory canals effectively. Thorough cleaning of accessory canals can be achieved through effective irrigation solutions such as sodium hypochlorite, ethylenediaminetetraacetic (EDTA), and chlorhexidine, which help dissolve organic tissues and remove debris. Techniques like ultrasonic and sonic activation, as well as negative pressure irrigation systems, enhance the penetration and effectiveness of these irrigants. Additionally, the use of modern nickel-titanium rotary files, ultrasonic irrigation, and supplementary chelating agents enhances the management of complex canal configurations.