Comparación del desgate dentinal simulado generado por dos sistemas rotatorios de preparación intrarradicular

Abstract

The thickness of root dentin in endodontically treated teeth is an important factor in the restored tooth prognosis. Objective: To evaluate two systems for preparing intra-radicular posts linking it to dentin thickness attrition with CBCT. Method: In vitro experimental study was carried out on 32 simulated upper central incisors in hybrid resin with identical anatomy, they were distributed in 2 groups of teeth (n= 16), and the EASY-POST® and PEESO® study systems were assigned to each one, the wear was measured at 12mm, 15mm and 18mm from the incisal edge. The’t’ test and repeated measures ANOVA with Bonferroni post Hoc, 95% confidence level, were used. Results: Groups were comparable in the basal stage, in the filling phase, biomechanical preparation and intra-radicular retainer preparation (p>0.05). The amount of wear of remaining dentin thickness was presented in the axial measurement of 12 mm in the palatal with the EASY POST® system (2.39 ± 0.55); in the 15 mm axial measurement, it was observed that in the vestibular area the PEESO® system presented greater wear (1.98 mm ± 0.48 mm) regarding EASY POST® (1.64 mm ± 0.66 mm) and at 18mm no significant difference is observed. The dentin thickness wear with both systems used was greater in the intraradicular preparation stage compared to the initial and biomechanical preparation measurements.