揭示NiTi内牙科文件的疲劳寿命:一个集成的计算实验研究
Shravan Kumar Subramanian1, Vivek Joshi1, Sahil Kalra1
1Department of Mechanical Engineering, Indian Institute of Technology Jammu, India.
概括
尼克尔- (NiTi) 内牙科文件由于道曲率和速度而导致骨折. 优化旋转速度,曲率半径和通道曲率可以显著延长文件寿命并降低故障风险.
科学领域:
- 生物材料科学 生物材料科学
- 机械工程 机械工程
- 牙周内科医院 牙周内科医院 牙周内科医院
背景情况:
- - (NiTi) 旋转文件容易疲劳,在根管中发生剪切损伤.
- 在根管治疗期间过早的骨折会导致并发症.
研究的目的:
- 研究曲率半径,通道曲率和旋转速度对NiTi文件疲劳寿命和故障模式的综合影响.
- 开发一种计算和实验方法来预测NiTi文件的功能寿命.
主要方法:
- 在曲通道中对NiTi文件动态的有限元模拟.
- 将临界应力/应变值纳入实证疲劳模型.
- 在各种参数上使用人工曲通道进行实验验证.
主要成果:
- 增加通道曲率 (>60°) 和减少曲率半径 (<5毫米) 显著降低了文件的功能寿命.
- 更高的旋转速度 (>360rpm) 加剧了损伤,特别是在严重曲的运河.
- 剪切应力在低曲率上占主导地位;在高曲率上,结合的剪切疲劳效应突出.
结论:
- 操作参数协同影响NiTi文件疲劳损伤.
- 优化参数可以延长内牙文件的功能寿命,并减少手术期间的故障.
- 经过验证的计算模型有助于对新的NiTi文件设计进行虚拟测试.
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