Hanada Takahiro, Quevedo Carlos Gabriel Adorno, Okitsu Motoko, Yoshioka Takatomo, Iwasaki Naohiko, Takahashi Hidekazu, Suda Hideaki
Pulp Biology and Endodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.
Aust Endod J. 2010 Apr;36(1):19-23. doi: 10.1111/j.1747-4477.2009.00189.x.
The aim of this study was to compare the fracture resistance of roots following root canal therapy using the RC Sealer system, the Epiphany system and the conventional system of gutta-percha and Sealapex. Fifty-six maxillary central incisors were divided into eight groups of seven teeth each, according to master apical file size and obturation systems. Obturation materials in the root canal were vertically loaded using a universal testing machine. Fracture loads were analysed by ANOVA and Tukey comparison, and fracture patterns were analysed with ordinal logistic regression. Master apical file size 80 had a significantly lower fracture load than size 40 (P < 0.05). The groups obturated using the Resilon Cone and the Epiphany Sealer had significantly lower fracture loads than the other groups (P < 0.05). There was no significant improvement in resistance to vertical root fractures using the examined adhesive resin root canal filling systems, compared with conventional gutta-percha and sealer.
本研究的目的是比较使用RC封闭剂系统、Epiphany系统以及传统的牙胶尖和Sealapex系统进行根管治疗后牙根的抗折性。根据主尖锉尺寸和充填系统，将56颗上颌中切牙分为8组，每组7颗牙。使用万能试验机对根管内的充填材料进行垂直加载。采用方差分析和Tukey比较分析抗折载荷，并通过有序逻辑回归分析骨折类型。主尖锉尺寸为80的组的抗折载荷显著低于尺寸为40的组（P < 0.05）。使用Resilon牙胶尖和Epiphany封闭剂充填的组的抗折载荷显著低于其他组（P < 0.05）。与传统的牙胶尖和封闭剂相比，所检测的粘结树脂根管充填系统在垂直牙根骨折的抗力方面没有显著改善。
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