Effects of coronal flaring using Gates-Glidden and LA Axxess burs on apical deviation after root canals biomechanical preparation

Abstract

The aim of this study was to compare the influence of coronal flaring using Gates Glidden or LA Axxess burs on apical deviation after biomechanical preparation of root canals. Thirty mesiobuccal canals of mandibular first molars were selected in FOUPF tooth bank. The teeth were conventionally accessed and with aid of a radiographic platform was realized an initial radiography with a K file # 10 in working length. These radiographic films were not revealed to allow a second radiography over the same film. The teeth were randomly separated in two groups (n = 15): G1 – coronal flaring with Gates- Glidden burs; G2 – coronal flaring with LA Axxess burs. The canals were hand-prepared up to #30 hand files in the working length after coronal flaring. A new radiography was realized, by double exhibition technique, in the radiographic platform. Radiographic films were revealed and appraised for three examiners. Mann-Whitney test showed there was not a statistically significant difference between the groups (α > 0,05). Within of the study conditions was possible to conclude that, coronal flaring using Gates-Glidden burs or LA Axxess showed similar levels of apical deviation incident.