ProTaper、iRaCe、TF和HyflexCM根管成形能力的体外实验研究

Comparison of shaping ability of ProTaper,iRaCe,TF and HyflexCM in simulated root canals

目的:比较4种机用镍钛器械对树脂模拟根管的成形能力。方法:将40个树脂模拟根管随机分成4组(n=10),分别使用ProTaper Universal、iRa Ce、Twisted Files和Hyflex CM进行根管预备,记录预备时间;使用相机采集预备前后根管图像,进行图像重叠,测量不同位置根管弯曲内外侧壁树脂去除量,并分析比较中心定位能力。结果:iRa Ce与TF预备时间最短(P<0. 05),ProTaper预备时间最长(P<0. 05)。在根尖段,Hyflex CM的中心定位能力最优(P<0. 05),ProTaper造成的偏移最大(P<0. 05)。结论:iRa Ce与TF预备效率最高; Hyflex CM的中心定位能力最优。

Objective: To compare the shaping ability of 4 types of Ni-Ti endodontic instruments in simulated root canals.Methods: A total of 40 simulated root canals were randomly assigned to 4 groups( n = 10) and respectively prepared by ProTaper Universal,iRaCe,Twisted Files and HyflexCM.Preparation time was recorded.Pre-and post-preparation photos of the simulated root canals were taken and superimposed. The resin removed from the walls of the inner and outer canal bends were measured. Shaping ability was determined accordingly. Results: iRaCe and TF were significantly faster( P <0. 05),and ProTaper was the slowest( P < 0. 05). In the apical section,shaping ability of HyflexCM was the best( P <0. 05),and ProTaper was the worst( P<0. 05). Conclusion: iRaCe and TF were the most efficient and HyflexCM showed the best shaping ability.