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Dent Mater J:不同锥度的镍钛牙髓旋转器械机械特质的比较分析

2018-10-05 lishiting MedSci原创

这篇研究的目的是为了比较不同锥度的EndoWave镍钛牙髓旋转器械(size #30/0.04 taper and #30/0.06 taper; Group 0.04 and 0.06, respectively)的机械特质。

这篇研究的目的是为了比较不同锥度的EndoWave镍钛牙髓旋转器械(size #30/0.04 taper and #30/0.06 taper; Group 0.04 and 0.06, respectively)的机械特质。

研究分别通过循环疲劳试验和悬臂弯曲试验评估器械的扭转和弯曲特质。通过对埋置于树脂块中的弯曲根管进行预备并评估根管偏移情况。通过自动化仪表和扭矩/力分析装置检测预备过程中的扭矩和根尖压力。

结果显示,Group 0.04的折断循环次数明显大于Group 0.06 (p<0.05)。而Group 0.06的弯曲负荷值显著大于Group 0.04 (p<0.05)。与Group 0.06相比,Group 0.04可以更好的保持根管的最初形态。Group 0.06的顺时针扭矩平均值明显大于Group 0.04 (p<0.05),而2者逆时针扭矩平均值与根尖压力值之间没有显著性差异(p>0.05)。

结论:基于本项研究条件和结果,0.04和0.06锥度的EndoWave器械展现出不同的机械特质。

原始出处:

Fukumori Y, Nishijyo M, et al. Comparative analysis of mechanical properties of differently tapered nickeltitanium endodontic rotary instruments. Dent Mater J. 2018 Jul 29;37(4):667-674. doi: 10.4012/dmj.2017-312. Epub 2018 May 2.

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    2019-07-07 30397613
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    2018-11-16 jxrzshh
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    2019-03-18 nymo
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