根据有限元分析,优化脚螺丝参数以提高植入物稳定性
Qiang Li1, Hu Zhao2, Jinshuai Yang2
1School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, People's Republic of China; Shanghai Engineering Research Center of High-Performance Medical Device Materials, Shanghai, People's Republic of China.
World neurosurgery
|December 27, 2023
概括
通过有限元分析优化脚螺丝 (PS) 设计,提高了植入物稳定性. 增加外径和降低斜率显著改善插入扭矩和拉出力,以获得更好的脊柱融合结果.
科学领域:
- 脊柱外科手术 脊柱外科手术
- 生物机械工程 生物机械工程
- 医疗器械设计 医疗器械设计
背景情况:
- 脚螺丝 (PS) 对于脊柱融合手术至关重要.
- 提高PS稳定性对于成功的手术结果至关重要.
- 目前的PS设计可能在实现最佳生物机械性能方面存在局限性.
研究的目的:
- 优化脚螺丝 (PS) 参数,以提高植入物稳定性.
- 调查外径,线程深度和杆对PS性能的影响.
- 使用有限元分析 (FEA) 来指导PS设计修改.
主要方法:
- 使用有限元素分析 (FEA) 模拟的脚螺丝 (PS) 插入和拔出.
- 通过将FEA结果与机械测试数据进行比较,验证了模拟准确性.
- 进行单因素和直角实验,分析对扭矩和拉出力的参数影响.
主要成果:
- FEA模拟与机械测试结果非常相匹配.
- 参数对插入扭矩和拉出力的影响遵循以下顺序:外径>角>线程深度.
- 与标准螺丝相比,优化的PS显示最大插入扭矩增加了23.9%,最大拉出力增加了9.1%.
结论:
- 有限元分析模型是有效的评估脚螺丝 (PS) 植入物稳定性.
- 增加PS外径和降低斜率是增强插入扭矩和拉出力的关键策略.
- 脚的大小和骨矿物质密度是影响PS在体内稳定的其他关键因素.
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