Comparative Investigation of The Impact of Instrument Taper on Fracture Resistance of Endodontically Treated Teeth: An In Vitro Study

OBJECTIVE: This study sought to determine how instrument taper affected endodontically treated roots' ability to withstand fractures in an in vitro experimental setting. METHODS: At a distance of roughly 15 mm from the apex, 40 mandibular first premolars were sectioned in total. One control group (n = 10) and three experimental groups (n = 10) were each randomly distributed. Group 2 used a Hyflex EDM rotary file (40/.06), Group 3 used a Neoendo Neohybrid rotary file (40/.04), and Group 4 acted as an uninstrumented control. The roots in Group 1 were instrumented with hand files up to file (40/.02). The roots were mechanically prepared, then sealed and obturated using gutta-percha. Using a universal testing machine, a vertical load will be applied to each specimen until the roots shatter. STATISTICAL ANALYSIS-Data was gathered and examined statistically.