线程几何和骨密度对牙植入物压力分布的影响:有限元素研究
Vinay Rana1, Swatantra Agarwal1, Reena Mittal1
1Department of Prosthodontics, Kothiwal Dental College and Research Centre, Moradabad, IND.
Cureus
|October 30, 2025
概括
方形线程减少了植入物应力,但增加了皮质骨载荷,而梯形线程则相反. 最佳的牙科植入物线设计取决于骨密度的长期成功.
科学领域:
- 生物材料工程 生物材料工程
- 生物力学 生物力学
- 牙科植入物学 牙科植入物学
背景情况:
- 在植入物-骨接口的最佳应力分布对于牙植入物成功至关重要.
- 线程设计和骨密度显著影响应力分布.
- 与V形和支柱设计相比,正方形和梯形线程设计尚未得到充分探索.
研究的目的:
- 为了比较方形和梯形牙植入物线设计的应力分布模式.
- 用三维有限元素分析 (FEA) 来分析不同骨密度的应力分布.
主要方法:
- 创建了八个3D有限元模型,将四角形和梯形线设计与四个骨密度相结合.
- 一个下第一个部植入物模型被 subjected to a 100 N轴负.
- 在植入物和骨组织中使用FEA软件分析了·米塞斯压力.
主要成果:
- 梯形线程产生较高的植入应力 (7.16-18.83 MPa) 比方形线程 (5.21-15.08 MPa),特别是在低密度骨.
- 方形线程将更多的应力转移到皮层骨 (3.69-9.60 MPa) 与梯形线程 (2.73-7.98 MPa) 相比.
- 压力度根据骨密度而异,局部在密集骨的线程上,分散在低密度骨中.
结论:
- 方形线程降低了植入物应力,但增加了皮质骨载荷;梯形线程减少了皮质应力,以牺牲更高的植入物应力为代价.
- 方形线程可能更适合密集的骨头,而梯形设计可能会提高低密度骨头的稳定性.
- 术前骨密度评估对于选择最佳线程设计至关重要,以确保长期的牙植入成功.
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