Hiran-us Sirawut, Pimkhaokham Somsinee, Sawasdichai Jirapat, Ebihara Arata, Suda Hideaki
Graduate School, Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
Aust Endod J. 2016 Apr;42(1):32-6. doi: 10.1111/aej.12117. Epub 2015 Sep 29.
The aim of this study was to determine the shaping ability of three nickel-titanium endodontic file systems by comparing three parameters: canal deviation, apical foramen position and instrumentation time. A glide path was established in 30 simulated S-shaped canal blocks that were randomly assigned into three groups (n = 10): ProTaper Universal, ProTaper NEXT and iRace. Each group was instrumented per its manufacturer's directions. Pre- and postoperative images were superimposed to determine any canal deviation or change in apical foramen position. The instrumentation times were recorded. The iRace system resulted in the least mean canal deviation. The apical foramen position was least shifted by the iRace system. The iRace system also required the least instrumentation time. The iRace system demonstrated the most favourable shaping ability in all three parameters.
根管偏移、根尖孔位置和预备时间，来确定三种镍钛根管锉系统的塑形能力。在30个模拟S形根管模型中建立引导通路，这些模型被随机分为三组（n = 10）：ProTaper Universal、ProTaper NEXT和iRace。每组按照其制造商的说明进行预备。术前和术后的图像进行叠加，以确定任何根管偏移或根尖孔位置的变化。记录预备时间。iRace系统导致的平均根管偏移最小。iRace系统使根尖孔位置的偏移最小。iRace系统还需要最少的预备时间。在所有三个参数方面，iRace系统均表现出最有利的塑形能力。
