Comparative analysis of root canal anatomy after mechanical preparation with hyflex CM TM and hyflex EDM TM

Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016INTRODUCTION: One of the primary goals of root canal preparation is following the original anatomy of the canal, maintaining the root canal curvature and the spatial relationship of the apical foramen to periapical tissues and root surface. The aims of this study are to evaluate maintenance of the original canal anatomy when comparing two different rotary systems, HyFlex CM™ and HyFlex EDM™, and to verify the influence of sterilization on the cutting efficiency of the same systems. MATERIAL AND METHODS: A quantitative analysis was made by measuring canals of 30 samples, distributed by two groups of 15 samples each (Group A - HyFlex EDM™, Group B – HyFlex CM™), by superimposed images of pre and post instrumentation using Rhinoceros Software. The statistical analysis was obtained using Shapiro-Wilk test, Levene’s test, Mann-Whitney U test and student’s t-test, with a significance of p