Optimizing Root Canal Therapy: An In Vitro Comparative Study of Innovative File Systems on Mandibular Premolar Fracture Resistance.

Introduction And Aim:  Root canal therapy is a vital procedure for saving teeth by removing infection and cleaning the complex root canal system. However, a delicate balance exists between thorough cleaning and preserving tooth strength. The study aims to evaluate the instrumentation effect of three innovative file systems, XP-endo® shaper, Reciproc®, and Self-adjusting file (SAF) on fracture resistance of mandibular premolars.

Effect of modulated photoactivation of bulkfill composite on microleakage in fluorosed and nonfluorosed teeth: A confocal laser scanning microscopy study.

Aim: The aim of this study is to compare the microleakage of bulkfill composite activated by modulated photoactivation between fluorosed and nonfluorosed teeth using the confocal laser scanning microscope.

Methodology: One hundred and twenty intact human premolar teeth with Thylstrup and Fejerskov index fluorosis index 0-4 were stored in 0.5% thymol at the room temperature until further use.

Endodontic management of two-rooted mandibular premolars using spiral computed tomography: a report of two cases.

Aim: To present a unique case of mandibular first and second premolars with two roots and two root canals with the aid of spiral computed tomography (SCT).

Background: Confirmation of morphology of mandibular first and second premolars with the aid of SCT.

Case Description: Mandibular premolars usually have a single root and a single canal.