Email Alert | RSS

北京大学学报(医学版) ›› 2018, Vol. 50 ›› Issue (5): 876-881. doi: 10.19723/j.issn.1671-167X.2018.05.019

• 论著 • 上一篇    下一篇

电火花蚀刻镍钛根管锉HyFlex EDM的表面形态和抗疲劳折断性能

王芳芳1，2，杨殷杰3，侯晓玫1△   

  1. （1.北京大学口腔医学院·口腔医院， 第二门诊部国家口腔疾病临床医学研究中心口腔数字化医疗技术和材料国家工程实验室口腔数字医学北京市重点实验室， 北京100101； 2.首都医科大学宣武医院口腔科， 北京100053； 3.北京市西城区新街口社区卫生服务中心口腔科， 北京100035）
  • 出版日期:2018-10-18 发布日期:2018-10-18
  • 通讯作者: 侯晓玫 E-mail:houxiaomei1108@163.com
  • 基金资助:
     国家自然科学基金（81200826）

Surface microstructure and cyclic fatigue resistance of electro discharged machining nickel-titanium endodontic instrument

WANG Fang-fang1,2, YANG Yin-jie3, HOU Xiao-mei1△   

  1. (1. Second Clinical Division, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100101, China; 2. Department of Stomatology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China; 3. Department of Stomatology, Beijing Xicheng District Xinjiekou Community Health Service Center, Beijing 100035, China)
  • Online:2018-10-18 Published:2018-10-18
  • Contact: HOU Xiao-mei E-mail:houxiaomei1108@163.com
  • Supported by:
    Supported by the National Natural Science Foundation of China (81200826)

RICH HTML

  

PDF (PC)

摘要：  目的：比较镍钛根管锉HyFlex EDM、HyFlex CM和HyFlex NT的表面形态和抗疲劳折断性能。方法：选取新的25 mm长、25#/尖端4 mm为0.08锥度的变锥度HyFlex EDM 12支；25 mm长、25#/0.06锥度的HyFlex CM和HyFlex NT各12支。每组随机选取2支，在扫描电子显微镜（scanning electron microscope，SEM）下观察表面形态，剩余10支使用 60°弯曲角度、3.5 mm弯曲半径的模拟金属根管检测抗疲劳折断性能。记录疲劳折断时间、计算疲劳折断圈数（number of cyclic fatigue，NCF）；测量折断段长度（fragment length），并在SEM下观察断口。以上数据使用oneway ANOVA进行统计分析，显著性水平0.05。结果：SEM显示Hyflex EDM表面呈熔蚀状，可见均匀孔洞样结构；HyFlex CM和HyFlex NT表面较光滑，均可见明显的车磨条纹和缺陷。HyFlex EDM的疲劳折断圈数为838±223，HyFlex CM为582±99，HyFlex NT为81±20，两两比较差异有统计学意义（P<0.05）；HyFlex EDM的断段长度显著长于HyFlex CM和HyFlex NT（P<0.05）， 所有断口均呈现典型的疲劳折断特征。结论：电火花蚀刻工艺使HyFlex EDM呈现熔蚀伴孔洞样表面形态，未见明显车磨缺陷，抗疲劳折断性能显著提高。

关键词:  , 牙科器械, 镍, 钛, 电火花蚀刻, 疲劳折断

Abstract: Objective： To compare the surface microstructures and cyclic fatigue resistance of HyFlex EDM with HyFlex CM and HyFlex NT. Methods: Twelve 25 mmlong 25#/~ HyFlex EDM and twelve 25 mm-long 25#/0.06 taper HyFlex CM or HyFlex NT were selected. The surface microstructure of the 2 instruments which were randomly selected from each group was observed by using scanning electron microscope (SEM). The remaining 10 instruments from each group were submitted to the cyclic fatigue test by using a simulated stainless steel root canal with 60° angle of curvature and curvature radius of 3.5 mm. The time till fracture was recorded, the number of cyclic fatigue (NCF) was calculated, the length of fracture fragment was evaluated, and the topographic features were analyzed by using SEM. The data were analyzed by using oneway analysis via SPSS 23.0 software. The statistical significance level was set at 0.05. Results: SEM observation of the surface and microstructural characterization revealed peculiar melting appearance and evenly distributed micropores on the surface of HyFlex EDM while observations of the surface of both HyFlex CM and HyFlex NT demonstrated machining grooves and irregularities. The NCF of HyFlex EDM was 838±223, which was significantly higher than not only that of HyFlex CM (582±99), but also that of HyFlex NT (81±20) (P<0.05), and the difference between the latter two groups was significant, as well (P<0.05). The length of fractured fragments of HyFlex EDM was (7.27±0.28) mm, which was significantly longer than the HyFlex CM and HyFlex NT, with values of (6.72±0.26) mm and (6.62±0.37) mm, respectively (P<0.05). Topographic features demonstrated typical cyclic fatigue for all the three groups while the region of crack origins was more for HyFlex EDM and HyFlex CM than that of HyFlex NT. As far as the dimple area was concerned, that of HyFlex EDM was deeper and larger than that of HyFlex CM and HyFlex NT. Conclusion: Within the limitations of this study, electro-discharge machining leads to peculiar melting appearance with micropores instead of machining grooves and irregularities on the surface of HyFlex EDM, which may be the reason why HyFlex EDM exhibits significantly better cyclicfatigue resistance than HyFlex CM and HyFlex NT.

Key words: Dental instruments, Nickel, Titanium, Electro-discharge machining, Cyclic fatigue

中图分类号: 

  • R783.2
[1] 陈文新, 侯晓玫. Gold热处理镍钛锉在模拟S形根管内的抗疲劳折断性能[J]. 北京大学学报（医学版）, 2025, 57(1): 136-141.
[2] 史佳琪,马莺,张奕,陈章健,贾光. 纳米二氧化钛颗粒对人肝癌细胞HepG2中circRNA表达谱的影响[J]. 北京大学学报（医学版）, 2023, 55(3): 392-399.
[3] 周华,王仁吉,刘忠军,刘晓光,吴奉梁,党礌,韦峰. 3D打印人工椎体在颈椎脊索瘤全脊椎切除术中的应用[J]. 北京大学学报（医学版）, 2023, 55(1): 144-148.
[4] 张家赫, 史佳琪, 陈章健, 贾光. 基于人消化道微生态体外模拟系统观察纳米二氧化钛对肠道菌群的影响[J]. 北京大学学报（医学版）, 2022, 54(3): 468-476.
[5] 陈章健,韩硕,郑湃,贾光. 锐钛矿型纳米二氧化钛经口暴露90天对Sprague-Dawley大鼠血常规指标的影响[J]. 北京大学学报（医学版）, 2021, 53(6): 1205-1208.
[6] 周迪,陈章健,胡贵平,阎腾龙,龙昌茂,冯慧敏,贾光. 纳米二氧化钛亚急性经口暴露对大鼠氧化/抗氧化生物标志和炎性因子的影响[J]. 北京大学学报（医学版）, 2020, 52(5): 821-827.
[7] 陈章健,韩硕,郑湃,周淑佩,贾光. 纳米二氧化钛与葡萄糖亚慢性联合经口暴露对幼年大鼠血清叶酸和维生素B12水平的影响[J]. 北京大学学报（医学版）, 2020, 52(3): 451-456.
[8] 韩硕,陈章健,周迪,郑湃,张家赫,贾光. 纳米二氧化钛经口暴露90天对大鼠粪便代谢组的影响[J]. 北京大学学报（医学版）, 2020, 52(3): 457-463.
[9] 葛严军,刘晓强. 放大镜与显微镜辅助下瓷贴面牙体预备效果的比较[J]. 北京大学学报（医学版）, 2019, 51(1): 100-104.
[10] 李贝贝,邸萍. CAD/CAM钛合金表面处理工艺联合树脂粘接剂对硬质复合树脂粘接强度和耐久性的影响[J]. 北京大学学报（医学版）, 2019, 51(1): 111-114.
[11] 付宏宇,王芳芳,侯晓玫. 控制记忆合金丝镍钛根管锉弯曲性能有限元分析模型的构建及力学分析[J]. 北京大学学报（医学版）, 2019, 51(1): 131-135.
[12] 李刚，王健生，秦思达，张佳，杜宁，张靖，孙欣，任宏. 布地奈德联合氨溴索氧化驱动雾化吸入预防成人开胸术后肺炎的临床疗效[J]. 北京大学学报(医学版), 2018, 50(5): 840-844.
[13] 倪莲芳，王鹤，李虹，张志刚，刘新民. 非人类免疫缺陷病毒感染肺隐球菌病34例临床分析[J]. 北京大学学报(医学版), 2018, 50(5): 855-860.
[14] 杨殷杰，侯本祥，侯晓玫. 高压蒸汽灭菌对R-相镍钛锉表面形态及疲劳折断性能的影响[J]. 北京大学学报(医学版), 2018, 50(5): 882-886.
[15] 王昊，陈亮，叶小云. 雷公藤甲素对TM4细胞氧化应激及PI3K/AKT通路的影响[J]. 北京大学学报(医学版), 2018, 50(4): 607-612.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
ISSN 1671-167X
CN 11-4691/R
主管单位：中华人民共和国教育部
主办单位：北京大学
地址： 北京市海淀区学院路38号 北京大学医学部 《北京大学学报（医学版）》
邮编：100191
电话：010-82801551
Email： xbbjb2@bjmu.edu.cn

《北京大学学报（医学版）》
微信公众号
版权所有 © 2018 《北京大学学报（医学版）》编辑部