在具有不同内部连接的单单和三单元植入物支持假肢中,应力分布的光弹性分析
Abbas Zahoui1, Marcelo Coelho Goiato2, Rodrigo Antonio de Medeiros3
1Faculty of Dentistry, University Sagrado Coração - USC, Bauru, SP, Brazil.
Journal of dental research, dental clinics, dental prospects
|December 3, 2025
概括
牙植入物连接在轴负下显示了类似的应力分布. 斜力增加了应力,莫尔斯缩摩擦系统展示了最低的应力度,改善了植入物稳定性.
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:
- 精确的牙植入物-牙支架配合对于假肢的稳定性和对骨的密闭负荷分布至关重要.
- 内部连接植入物旨在增强植入物和骨之间的应力分布.
- 有限的研究存在于各种内部植入物-支架连接的生物力学行为.
研究的目的:
- 为了研究和比较螺纹植入物支假体中的应力分布,具有不同的内部植入物支连接.
- 为了评估摩尔斯渐变 (MT),内部摩尔斯六边形 (IMH),摩尔斯渐变六边形 (MTH) 和摩擦摩尔斯渐变 (FMT) 连接的生物力学性能.
主要方法:
- 使用PL-2树脂制造八个光弹性模型,代表四种内部连接类型和单/3单元冠.
- 在圆形极光镜内使用通用测试机器将100-N轴向和斜向 (45o) 负荷应用于闭塞表面.
- 通过摄影记录和Adobe Photoshop对压力模式进行定性分析.
主要成果:
- 轴负荷在应力边缘数或连接类型之间的分布上没有显著差异,对于两个冠状配置.
- 在轴承负载下,在植入物顶部观察到低应力值.
- 在所有测试组中,斜负荷显著增加了应力边缘的数量.
结论:
- 评估的内部连接在轴承负载下没有显著改变应力分布.
- 与轴承负荷相比,斜负荷会导致较高的应力度.
- 摩尔斯圆摩擦系统表现出减少的应力,这表明可能提高植入物-假肢的稳定性.
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