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| 新型镍钛器械循环疲劳抗性的研究 | |
| 引用本文： | 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. DOI: 10.13701/j.cnki.kqyxyj.2016.05.003 |
| 作者姓名： | 赵丹 彭彬 |
| 作者单位： | 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 |
| 基金项目： | 湖北省自然科学基金项目(编号:2014CFB468) |
| 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 |
| 收稿时间： | 2016-01-29 |
Resistance to Cyclic Fatigue Failure of New Nickel-titanium Rotary Instruments. |
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| 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. DOI: 10.13701/j.cnki.kqyxyj.2016.05.003 | |
| Authors: | ZHAO Dan PENG Bin. |
| Affiliation: | Key Laboratory for Oral Biomedical Engineering of Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China |
| 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. |
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