Chatchawanwirote Yanisa, Yanpiset Kallaya, Jantarat Jeeraphat
Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Aust Endod J. 2022 Dec;48(3):487-493. doi: 10.1111/aej.12604. Epub 2021 Dec 20.
This study compared the percentage reduction of total obturation materials, gutta-percha and sealer, using two rotary file systems with/without solvent in retreating C-shaped root canals and to evaluate the effect of the solvent on instrument separation. C-shaped root canals were scanned using micro-CT to identify the root canal morphology and randomly assigned to four groups (n = 12). Retreatment was performed using ProTaper Universal Retreatment (PTUR) or XP-endo systems with/without solvent. The number of separated instruments were recorded. The samples were scanned pre- and post-retreatment. The percentage reduction of total obturation materials, gutta-percha and sealer, were calculated. The percentage reduction of gutta-percha in the PTUR without solvent group was significantly lower than the other groups (P = 0.018). The number of separated instruments in the solvent groups were significantly lower than the no solvent groups (P < 0.05). Solvent increased gutta-percha removal, when using PTUR and decreased the occurrence of separated instruments for both systems.
本研究比较了在对C形根管进行再治疗时，使用两种带或不带溶剂的旋转锉系统，根管充填材料（牙胶和封闭剂）的减少百分比，并评估溶剂对器械分离的影响。使用显微CT扫描C形根管以确定根管形态，并将其随机分为四组（n = 12）。使用ProTaper Universal Retreatment（PTUR）或XP-endo系统带或不带溶剂进行再治疗。记录分离器械的数量。在再治疗前后对样本进行扫描。计算根管充填材料、牙胶和封闭剂的减少百分比。无溶剂PTUR组的牙胶减少百分比显著低于其他组（P = 0.018）。溶剂组的分离器械数量显著低于无溶剂组（P < 0.05）。使用PTUR时，溶剂增加了牙胶的去除量，并减少了两个系统中器械分离的发生。
