Clinical outcome of guided endodontics versus freehand drilling: A controlled clinical trial, single arm with external control group.

Aim: High-quality, prospective clinical studies are needed to increase evidence for guided endodontics. This study aims to assess the clinical outcome of guided endodontics for treatment of teeth presenting with pulp canal obliteration (PCO) in comparison with freehand treatment.

Methodology: This trial was registered in the ISRCTN.