压力分布分析在靠近植入物的骨中,在使用有限元分析的各种支柱-植入物连接设计中使用有限元分析
Ehsan Ghasemi1, Amirhossein Fathi2, Daryoush Mohammadi3
1Dental Implants Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
The Journal of oral implantology
|February 5, 2025
概括
牙植入物连接的压力比天然牙更高. 一个较长的摩尔塞线条 (2.6mm) 具有更宽的角度 (16°) 和垂直力,最大限度地减少了周围骨和植入物部件的压力.
科学领域:
- 生物材料工程 生物材料工程
- 牙科植入物学 牙科植入物学
- 有限元分析 有限元分析
背景情况:
- 天然牙具有粘性弹性牙周带,与牙植入物不同,牙植入物与骨强烈结合.
- 与自然牙相比,这种连接的差异导致牙植入物周围的骨和假肢部件的压力度更高.
研究的目的:
- 为了研究摩尔斯线程连接几何学 (长度和角度) 和力应用角度对牙科植入物中应力分布的影响.
- 确定最优的摩尔斯线程设计参数,以最大限度地降低对植入周围骨和假肢部件的压力.
主要方法:
- 根据DIO植入物规格开发了下,牙植入物和假肢组件的3D有限元模型.
- 设计了四个不同长度 (1.3mm,2.6mm) 和倾斜角度 (11°,16°) 的摩尔氏法渐变连接.
- 在三个角度 (0°,30°,45°) 施加一个恒定的200N力来模拟闭塞负荷,并分析应力分布.
主要成果:
- 从1.3mm增长到2.6mm,显著减少了邻近骨和假肢部件的压力.
- 从11°增加莫尔斯曲线倾斜角度到16°减少了骨头,固定装置和支柱的应力,但增加了植入物螺丝内部的应力.
- 与垂直力 (0°) 相比,更高的力应用角度 (30°,45°) 导致周围植入物骨和部件的应力增加.
结论:
- 一个较长的摩尔氏法线 (2.6mm) 与更大的倾斜角度 (16°) 是最优的,以最大限度地减少周围的骨头和假肢部件的压力.
- 垂直施加力角度进一步降低了应力,表明生物力学对齐在植入物设计和功能中的重要性.
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