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Monotonic torsional resistance and fatigue resistance of novel SCOPE RS instruments.
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-08-13 , DOI: 10.1002/jemt.23565 Ekim Onur Orhan 1 , İhsan Furkan Ertuğrul 2 , Samet Tosun
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-08-13 , DOI: 10.1002/jemt.23565 Ekim Onur Orhan 1 , İhsan Furkan Ertuğrul 2 , Samet Tosun
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To evaluate monotonic torsional resistance and fatigue resistance of novel SCOPE RS instruments and to compare ROTATE, Hyflex CM, OneCurve, and ProTaper Next instruments as a counterpart. The instrument groups were as follows: SCOPE RS; ROTATE; HyflexCM; OneCurve; ProTaperNext. The cyclic fatigue resistance of unused instruments was tested at both room and body temperatures (n = 10). The time to fracture, the mean number of cycles until failure, and the length of the fractured fragments were analyzed. The monotonic torsional resistance of new instruments was measured in accordingly American National Standards/American Dental Association No. 28 and International Organization for Standardization 3630–1:2008 specifications (n = 10). The maximum torque and angular deflection at break were recorded. The fractographic examination was performed by scanning electron microscope. Energy‐dispersive X‐ray spectroscopy was used to investigate the microstructure of NiTi instruments. One‐way ANOVA with Games‐Howell Post Hoc multiple comparisons tests were used (p < .05). The ROTATE had superior cyclic fatigue resistance than other groups in both temperature conditions (p < .01). However, it exhibited lower torsional resistance than SCOPE RS (p < .01). SCOPE RS had superior torsional resistance than other groups (p < .01). Micrographs revealed typical features of fatigue behaviors in all groups. Weight percentages of the Ni and Ti revealed similarity for all instruments. The novel SCOPE RS instruments presented superior monotonic torsional resistance but failed to show any improvement in the cyclic fatigue resistance compared with its counterparts, ROTATE, HyflexCM, and OneCurve.
中文翻译：
新型SCOPE RS仪器的单调抗扭性和抗疲劳性。
为了评估新型SCOPE RS仪器的单调抗扭强度和疲劳强度，并比较ROTATE，Hyflex CM，OneCurve和ProTaper Next仪器作为替代品。仪器组如下：SCOPE RS；旋转 HyflexCM; OneCurve; ProTaperNext。在室温和人体温度（n = 10）下测试了未使用仪器的耐循环疲劳性。分析断裂时间，直至破坏的平均周期数以及断裂片段的长度。相应地，在美国国家标准/美国牙科协会第28号和国际标准化组织3630–1：2008规范中测量了新器械的单调抗扭强度（n= 10）。记录最大扭矩和断裂时的角偏转。通过扫描电子显微镜进行分形检查。能量分散X射线光谱学用于研究NiTi仪器的微观结构。使用单因素方差分析和Games-Howell Post Hoc多重比较测试（p <.05）。在两种温度条件下，ROTATE的循环疲劳强度均优于其他组（p <.01）。但是，其抗扭强度低于SCOPE RS（p <.01）。SCOPE RS的抗扭力优于其他组（p <.01）。显微照片揭示了所有组的疲劳行为的典型特征。Ni和Ti的重量百分比显示所有仪器都相似。新型SCOPE RS仪器具有出色的单调抗扭性能，但与同类产品ROTATE，HyflexCM和OneCurve相比，其抗循环疲劳性能没有任何改善。
更新日期：2020-08-13
中文翻译：
新型SCOPE RS仪器的单调抗扭性和抗疲劳性。
为了评估新型SCOPE RS仪器的单调抗扭强度和疲劳强度，并比较ROTATE，Hyflex CM，OneCurve和ProTaper Next仪器作为替代品。仪器组如下：SCOPE RS；旋转 HyflexCM; OneCurve; ProTaperNext。在室温和人体温度（n = 10）下测试了未使用仪器的耐循环疲劳性。分析断裂时间，直至破坏的平均周期数以及断裂片段的长度。相应地，在美国国家标准/美国牙科协会第28号和国际标准化组织3630–1：2008规范中测量了新器械的单调抗扭强度（n= 10）。记录最大扭矩和断裂时的角偏转。通过扫描电子显微镜进行分形检查。能量分散X射线光谱学用于研究NiTi仪器的微观结构。使用单因素方差分析和Games-Howell Post Hoc多重比较测试（p <.05）。在两种温度条件下，ROTATE的循环疲劳强度均优于其他组（p <.01）。但是，其抗扭强度低于SCOPE RS（p <.01）。SCOPE RS的抗扭力优于其他组（p <.01）。显微照片揭示了所有组的疲劳行为的典型特征。Ni和Ti的重量百分比显示所有仪器都相似。新型SCOPE RS仪器具有出色的单调抗扭性能，但与同类产品ROTATE，HyflexCM和OneCurve相比，其抗循环疲劳性能没有任何改善。
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