平台直径和螺丝长度在无支架组织级植入系统中的生物机械效应与Ti基配置相比:3D有限元分析
Aliona Dodi1, Alecsandru Ionescu2, Mihaela Anca Marin1
1Discipline of Prosthodontics, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 37 Dionisie Lupu Street, District 2, 020021 Bucharest, Romania.
Journal of functional biomaterials
|January 27, 2026
概括
无支架的牙植入物可以提供与Ti基解决方案相比较的生物机械性能. 适当选择平台宽度和螺丝长度对于管理应力至关重要,特别是在曲负载下,但需要进一步验证.
科学领域:
- 生物材料科学 生物材料科学
- 机械工程 机械工程
- 牙科植入物学 牙科植入物学
背景情况:
- 组织层面的牙植入物被广泛使用.
- 蒂基支柱在植入式牙科中很常见.
- 无支架,直接植入的解决方案正在出现.
研究的目的:
- 为了比较Ti基支柱系统的生物力学性能与无支柱,直接到植入器的配置.
- 分析平台宽度和螺丝长度对轴和斜负荷下的应力分布的影响.
- 为了评估植入系统的不同组件中的应力度.
主要方法:
- 用有限元分析 (FEA) 来建模五种不同的配置.
- 模拟包括相同的材料和边界条件.
- 施加了螺丝前加载,随后进行了轴向 (400N) 和斜 (300N在30°) 的加载.
主要成果:
- 与轴向加载相比,斜加载显著增加了应力,将其集中在植入物部,第一线程和皇冠螺丝接入区域.
- 3.7毫米的平台植入物在斜负荷下表现出最高的应力.
- 4.5毫米平台和Ti-base配置显示了可比或较低的应力,峰值局部在内部.
结论:
- 无位,直接植入的工作流可以实现与Ti基解决方案相似的生物机械性能.
- 仔细选择平台和螺丝尺寸对于优化应力分布至关重要.
- 需要进行进一步的ISO式疲劳测试和临床验证来证实这些发现.
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