J Endod:一种全新One Curve镍钛器械在单双弯曲根管内的循环疲劳强度

2018-11-19 lishiting MedSci原创

这篇研究的目的是为了评估一种全新的One Curve (OC)器械在双(S-shaped)和单弯曲根管中的循环疲劳强度,并与其它镍钛旋转器械相对比。

这篇研究的目的是为了评估一种全新的One Curve (OC)器械在双(S-shaped)和单弯曲根管中的循环疲劳强度,并与其它镍钛旋转器械相对比。

研究对25/.06号的OC, 2Shape (TS), Vortex Blue (VB), ProFile Vortex (PV)和RaCe (RC)器械在37°C ± 1°C下于人造单弯曲根管(60° curvature, 5 mm radius)和双弯曲根管(coronal curve, 60° curvature, 5 mm radius; and apical curve, 70° curvature and 2 mm radius)内并浸泡在生理盐水中进行测试。计算循环折断(NCF)的数量,并通过扫描电子显微镜观察折断表面。通过one-way analysis of variance和Tukey post hoc检验对NCF及折断长度的数据进行统计学分析。T检验评估不同弯曲根管内折断长度之间的差异。显著性水平设置为P < .05。

结果显示,与其它器械相比,VB器械在双弯曲(S-shaped)和单弯曲根管内的NCF均明显增高(P < .05)。OC和TS在单、根尖和根上段双弯曲根管内的NCF之间没有显著性差异(P > .05)。在所有弯曲度中,RC具有最低的NCF值(P < .05)。

结论:VB的折断强度要高于其它器械。OC和TS器械比PV和RC展现出更强的循环疲劳强度。

原始出处:

Elnaghy AM, Elsaka SE. Cyclic Fatigue Resistance of One Curve, 2Shape, ProFile Vortex, Vortex Blue, and RaCe Nickel-Titanium Rotary Instruments in Single and Double Curvature Canals. J Endod. 2018 Nov;44(11):1725-1730. doi: 10.1016/j.joen.2018.07.023.

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    2018-11-21 tamgche
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