新型镍钛器械循环疲劳抗性的研究

doi:10.13701/j.cnki.kqyxyj.2016.05.003

口腔医学研究 ›› 2016, Vol. 32 ›› Issue (5): 437-439.DOI: 10.13701/j.cnki.kqyxyj.2016.05.003

新型镍钛器械循环疲劳抗性的研究

赵丹 ,彭彬^*

武汉大学口腔医学院口腔生物医学工程教育部重点实验室湖北武汉 430079

收稿日期:2016-01-29 出版日期:2016-05-26 发布日期:2016-05-26
通讯作者: 彭彬,电话:027-87686358
作者简介:暋赵丹(1983~ ),女,湖北人,主治医师,主要从事牙体牙髓病学方面的临床工作。
基金资助:
湖北省自然科学基金项目(编号:2014CFB468)

Resistance to Cyclic Fatigue Failure of New Nickel-titanium Rotary Instruments.

ZHAO Dan, PENG Bin^*.

Key Laboratory for Oral Biomedical Engineering of Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China

Received:2016-01-29 Online:2016-05-26 Published:2016-05-26

摘要/Abstract

摘要： 目的:运用金属模拟弯曲根管观察四种镍钛器械循环疲劳抗性能力的差异,为临床治疗提供参考资料。方法:将30/.06Hyflex CM、TF、K3XF和K3各30支,放入弯曲度为60°,曲率半径为3 mm的金属弯曲根管内,体外模拟器械抗疲劳折断的过程,计算折断时器械旋转的圈数,并用扫描电镜观察器械断面的特征。结果:Hyflex CM、TF、K3XF的循环疲劳折断旋转圈数显著高于K3。结论:经过热处理的新型镍钛器械Hyflex CM、TF、K3XF较传统镍钛器械K3在抗循环疲劳能力方面有明显优势。

关键词: 循环疲劳, 镍钛, 旋转器械

Abstract: Objective: To evaluate the cyclic fatigue resistance of rotary endodontic instruments made of traditional or new nickel-titanium (NiTi) alloys. Methods: 30/.06 Hyflex CM, TF, K3XF and K3 were tested in a simulated canal with 60° of curvature and 3-mm radius. The number of rotations until fracture was recorded for each instrument. All fracture surfaces were examined under the SEM. Results: Hyflex CM, TF and K3XF showed a significantly higher resistance to cyclic fatigue than K3. Scanning electron microscopy examination revealed a typical pattern of cyclic fatigue fracture for Hyflex CM, TF, K3XF and K3 that was characterized by fatigue striations and microcrack. Conclusion: Hyflex CM, TF, and K3XF instruments composed of new thermal treated alloy appeared more resistant to cyclic fatigue failure than K3 in a simulated canal model.

中图分类号:

R781.05

赵丹 ,彭彬. 新型镍钛器械循环疲劳抗性的研究[J]. 口腔医学研究, 2016, 32(5): 437-439.

ZHAO Dan, PENG Bin.. Resistance to Cyclic Fatigue Failure of New Nickel-titanium Rotary Instruments.[J]. Journal of Oral Science Research, 2016, 32(5): 437-439.

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新型镍钛器械循环疲劳抗性的研究

Resistance to Cyclic Fatigue Failure of New Nickel-titanium Rotary Instruments.

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