不同的植入物设计对应力分布的影响在四合一概念:有限元分析
Hasan Öztürk1, Mehtap Muğlalı2, Rabia Tül Adeviye Çankaya2
1Private Clinic, Antalya, Turkey.
概括
圆形,方形线程植入物可以减少"全对四"牙科概念中的压力. 这种有限元分析 (FEA) 表明特定的植入物设计可以改善植入物和下骨的应力分布.
科学领域:
- 生物材料科学 生物材料科学
- 牙科植入物学 牙科植入物学
- 生物力学 生物力学
背景情况:
- 全在四的治疗概念提供了一个固定的全门假肢解决方案.
- 了解压力分布对于长期的植入成功和骨保存至关重要.
- 优化植入物设计可以减轻在全弧修复中与悬臂力相关的风险.
研究的目的:
- 评估各种植入物设计对植入物内和周围下骨压力分布的影响.
- 为了比较形与圆柱形的植入物体几何形状和四种不同的线程设计 (V形,方形,支柱,可逆支柱).
- 通过使用三维有限元分析来确定All-on-Four概念的最佳植入特征.
主要方法:
- 一个无牙下的三维有限元素分析 (FEA) 模型的构建.
- 模拟八种不同的植入物设计 (形和圆柱体,有四种线程类型).
- 应用斜力 (300N在75°) 模拟假肢和评估·米塞斯应力 (VMS) 和最小主应力 (Pmin).
主要成果:
- 在形,方线植入物中观察到植入物上较低的Von Mises应力和皮层骨中的最小主应力.
- 在所有测试的设计中,在植入物部的皮质骨上发生了最高的应力度.
- 后部倾斜的植入物表现出更大的压力,没有发现椎骨压力的直接相关性.
结论:
- 带有正方形线程的形植入物在All-on-Four概念中似乎有利于应力分布.
- 植入物部的设计和倾斜程度显著影响皮质骨的压力.
- 进一步的临床研究是有必要的,以验证这些FEA发现的四人治疗.
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