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首页> 外文期刊>International endodontic journal >Comparison of cyclic fatigue resistance and bending properties of two reciprocating nickel‐titanium glide path files
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Comparison of cyclic fatigue resistance and bending properties of two reciprocating nickel‐titanium glide path files

机译:两种往复镍钛滑动路径缺陷的循环疲劳抗性和弯曲性能的比较

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Abstract Aim To compare the cyclic fatigue resistance and bending properties of R‐Pilot and WaveOne Gold ( WOG ) Glider files, at intracanal temperature (35°C). Methodology Forty R‐Pilot and 40 WOG Glider files were subjected to a cyclic fatigue resistance test ( n ?=?20), calculating the time to fracture ( TTF ) in an artificial stainless steel canal. The length of the fractured file tips ( FL ) was also measured. The fracture surface of fragments was examined with a scanning electron microscope, and the cross‐sectional area of the fractured surfaces was measured. Flexibility of the tested files ( n ?=?20) was determined using 45° bending test. Data were analysed statistically using the Mann–Whitney U ‐test at 5% significance level. Results Time to fracture was significantly higher in the R‐Pilot group compared to the WOG Glider ( P ??0.05). There was no significant difference between groups for fracture length. The bending resistance of R‐Pilot files was significantly greater than WOG Glider files ( P ??0.05). Conclusions A significant greater cyclic fatigue resistance was observed for R‐Pilot files compared to WOG Glider instruments, although the bending resistance of WOG Glider files was lower.
机译:摘要旨在比较R型飞行员和波浪金(WOG)滑翔机文件,骨膜温度(35°C)的循环疲劳电阻和弯曲性能。方法40 r-pilot和40次浪潮文件的循环疲劳电阻测试(n?=Δ20),计算人造不锈钢管中的裂缝(TTF)的时间。还测量了骨折文件提示(FL)的长度。用扫描电子显微镜检查片段的断裂表面,并测量裂缝表面的横截面积。使用45°弯曲测试测定测试文件的灵活性(n?=Δ2)。在5%的意义水平下,使用Mann-Whitney U -Test进行统计分析数据。与浪潮滑翔机相比,R-Plipot组中的结果时间骨折显着高(p?β0.05)。裂缝长度之间没有显着差异。 R-Pilot文件的弯曲电阻明显大于Wog滑翔机文件(P?&Δ05)。结论与浪潮滑翔机仪器相比,R-Pliper仪器对R型飞行员造成的显着更大的循环疲劳阻力,尽管斗篷滑翔机文件的弯曲电阻较低。

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