在侧向力下不同角度的多单元支柱的组件上的应力分布:有限元分析
Dong Lin1, Zi-Heng Wen2, Xiao-Ning Guo3
1Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.
角多单元支柱 (MUA) 植入组件的应力明显更高,特别是假肢螺丝. 这突显了角MUA植入物增加机械并发症的风险.
科学领域:
- 牙科植入物学 牙科植入物学
- 生物材料科学 生物材料科学
- 机械工程 机械工程
背景情况:
- 多单元支架 (MUA) 植入体复合体在牙科修复中被广泛使用.
- 对于长期的成功,MUA植入组件内部的应力分布,特别是螺丝,至关重要.
- 有限的数据存在于各种负载条件下的应力模式.
研究的目的:
- 在不同的负载场景下分析MUA植入元件的应力分布.
- 为了比较支柱螺丝与假肢螺丝的应力度.
- 为了评估支柱角对应力分布的影响.
主要方法:
- 用有限元分析 (FEA) 来建模MUA植入复合体.
- 模型具有0°,17°和30°的支柱角.
- 应用了轴向力 (200N) 和侧向力 (0N,30N,100N).
主要成果:
- 一个30°角的支柱显示了2.5倍的应力比一个直的支柱 (1185MPa对比437MPa).
- 侧向力显著增加了应力;100N的侧向力导致比没有侧向力 (2389MPa) 高出8倍的应力.
- 假肢螺丝的应力度高于支柱螺丝,主要是在第一根线程附近.
结论:
- 假肢螺丝在MUA植入复合体中更容易发生机械故障.
- 角的MUA植入物经历了明显的和更高的压力模式.
- 尽量减少咬伤力对于减少角MUA植入物患者机械并发症风险至关重要.
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