两种镍钛器械疲劳循环抗性的研究

doi:10.13701/j.cnki.kqyxyj.2021.09.009

口腔医学研究 ›› 2021, Vol. 37 ›› Issue (9): 810-813.DOI: 10.13701/j.cnki.kqyxyj.2021.09.009

两种镍钛器械疲劳循环抗性的研究

童方丽¹, 朱亚利², 谢成婕¹, 陈蕾^1*

1.南方医科大学口腔医院牙体牙髓科广东广州 510280;
2.肇庆医学高等专科学校广东肇庆 520280

收稿日期:2021-03-01 出版日期:2021-09-28 发布日期:2021-09-16
通讯作者: *陈蕾,E-mail:13660087016@163.com
作者简介:童方丽(1984~ ),女,主任医师,湖北人,主要从事牙体牙髓病学方面的临床工作。
基金资助:
南方医科大学口腔医院院级课题(编号:PY2018032)

Research on Cyclic Fatigue Resistance of Two Kinds of Nickel-titanium Instruments

TONG Fangli¹, ZHU Yali², XIE Chengjie¹, CHEN Lei^1*

1. Department of Endodontics, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China;
2. Zhaoqing Medical College, Zhaoqing 520280, China

Received:2021-03-01 Online:2021-09-28 Published:2021-09-16

摘要/Abstract

摘要： 目的: 比较采用往复运动模式的WaveOne Gold (WOG)和采用连续旋转模式的Protaper Next(PTN)两种镍钛器械抗循环疲劳能力的差异。方法: 将30支PTN X2和30支WOG Primary,放入特制的弯曲度为38°,曲率半径为5 mm循环疲劳抗力的测试装置中,计算器械折断所需的时间,测量折断部分的长度,并用扫描电镜观察器械断面形态。结果: WOG Primary的循环疲劳折断所需时间明显高于PTN X2(P＜0.01),两组折断器械的长度没有显著性差异。结论: 经过新型热处理并采用往返运动模式的WOG Primary较PTN X2在抗循环疲劳性能方面有明显优势。

关键词: 疲劳循环, WaveOne Gold, Protaper Next, 往复运动

Abstract: Objective: To evaluate the cyclic fatigue resistance of WaveOne Gold with reciprocating motion and Protaper Next with continuous rotary motion. Methods: Thirty WaveOne Gold Primary and 30 ProTaper Next X2 were tested in a custom-made three-pin device with a 38° curvature and 5-mm radius for cyclic loading. The time to fracture (in seconds) was recorded. The fracture length was measured with a digital caliper in millimeters. The fracture surfaces were examined under the scanning electron microscope. Results: The cyclic fatigue test revealed that WOG Primary took significantly longer time to fracture in contrast with ProTaper Next X2 (P<0.05). There was no difference in the fracture length between two groups. The scanning electron microscopy examination demonstrated typical pattern of cyclic fatigue. Conclusion: WOG composed of new thermal treated alloy with reciprocating motion appeared more resistance to cyclic fatigue resistance than ProTaper Next with continuous rotary motion.

Key words: cyclic fatigue, WaveOne Gold, Protaper Next, reciprocating

童方丽, 朱亚利, 谢成婕, 陈蕾. 两种镍钛器械疲劳循环抗性的研究[J]. 口腔医学研究, 2021, 37(9): 810-813.

TONG Fangli, ZHU Yali, XIE Chengjie, CHEN Lei. Research on Cyclic Fatigue Resistance of Two Kinds of Nickel-titanium Instruments[J]. Journal of Oral Science Research, 2021, 37(9): 810-813.

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两种镍钛器械疲劳循环抗性的研究

Research on Cyclic Fatigue Resistance of Two Kinds of Nickel-titanium Instruments

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