Department of Dental Clinic, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil.
Departament of Endodontics, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Aust Endod J. 2021 Aug;47(2):252-259. doi: 10.1111/aej.12469. Epub 2020 Nov 25.
The objective was to evaluate the shaping ability of XP-endo Shaper and Mtwo systems in oval-shaped canals preparation by microcomputed tomography (micro-CT) along the entire canal. The volume, surface area and percentage of unprepared area were evaluated by image processing in entire canal and apical third (5 mm). Apical transportation and centring ability were evaluated at 3, 5 and 7 mm from the apex. Forty single-canal oval canines were paired in two groups (n = 20) according to the instrumentation system: XP-endo Shaper and Mtwo. The teeth were scanned by micro-CT before and after instrumentation, using a thermal vat at 37°C. The XP-endo Shaper system was more effective in the instrumentation of oval-shaped canals when compared to Mtwo system, resulting in greater volume increases and lower percentage of unprepared canals walls in apical region. Regarding apical transportation and centring ability, no statistical difference was observed.
目的是通过微计算机断层扫描（micro-CT）评估 XP-endo Shaper 和 Mtwo 系统在椭圆形根管预备中的成形能力，沿整个根管进行评估。通过图像处理评估整个根管和根尖三分之一（5mm）的未预备区域的体积、表面积和未预备区域百分比。在距根尖 3、5 和 7mm 处评估根尖偏移和中心定位能力。根据器械系统，将 40 颗单根管椭圆形犬牙配对分为两组（n=20）：XP-endo Shaper 和 Mtwo。在器械预备前后，使用 37°C 的热盒对牙齿进行 micro-CT 扫描。与 Mtwo 系统相比，XP-endo Shaper 系统在椭圆形根管的器械预备中更有效，导致根尖区域的体积增加更大，未预备根管壁的百分比更低。关于根尖偏移和中心定位能力，未观察到统计学差异。
