在膝关节全关节整形术中划痕后,防止周围假肢骨折的茎
Qian Wan1, Aobo Zhang1, Yang Liu1
1Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China.
概括
用于全膝关节整形术的50毫米内髓茎优化减轻大腿口的压力,最大限度地降低骨折风险并改善初始稳定性. 这种茎长度平衡了降低隙应力与最小的应力屏蔽.
科学领域:
- 生物机械工程 生物机械工程
- 整形外科手术 整形外科手术
- 医疗器械设计 医疗器械设计
背景情况:
- 在全膝关节整形术 (TKA) 期间,前股骨突出增加了由于压力度而导致的周围假肢骨折风险.
- 内髓干是一种潜在的解决方案,但最优的干长度尚未确定.
研究的目的:
- 通过有限元分析确定TKA中大腿部部件的最佳内髓茎长度.
- 评估不同茎长度对假肢骨接口应力分布和微运动的影响.
主要方法:
- 创建了带有无茎和50,75,100mm茎的假肢的股骨有限元模型.
- ·米塞斯在股骨口的应力和横截面的应力分布在式负荷下进行了分析.
- 评估了假肢骨接口的微动作,以评估最初的稳定性.
主要成果:
- 50毫米的茎减少了40.0%的隙应力 (至43.1MPa),对于较长的茎则进一步减少.
- 75毫米的茎提供了最大的减压 (84.4%) 股骨部分,但50毫米的茎显示了最好的整体平衡.
- 微运动在茎上显著下降,特别是前侧上的50毫米茎.
结论:
- 在TKA.中,内茎有效地降低了部口的应力度.
- 50毫米的茎长提供了一个最佳的平衡,减少了隙应力,最小化了应力屏蔽,减少了微运动.
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