膝关节置换术中胫骨截骨厚度对胫骨截面的生物力学影响

发布时间：2018-02-14 02:29

本文关键词： 全膝关节置换术截骨厚度胫骨生物力学　出处：《医用生物力学》2017年02期 　论文类型：期刊论文

【摘要】：目的获得不同截骨厚度及不同活动状态下胫骨截面的生物力学情况,为临床膝关节置换术截骨厚度及指导患者术后活动提供理论基础。方法重建下肢骨性三维立体模型,依据全膝关节置换术截骨原则将胫骨近端分别截骨0、5、7、9 mm,对截骨后胫骨模型进行材料属性赋值,并分析站立、慢步、快跑、上楼4种活动状态下胫骨截面的应力、应变情况。结果在相同活动状态下,随着截骨厚度的增加,胫骨截骨面的最大应力和位移呈增长趋势。在同一截骨厚度下,随着活动强度的增强,胫骨截面的最大应力和位移总体上呈增长趋势。结论临床全膝关节置换术时胫骨截骨厚度越大、术后活动强度越强,胫骨截面的应力及应变越大。术中应避免过多截骨、术后应避免高强度活动,可减少胫骨平台的应力及应变,有利于假体的长期寿命。
[Abstract]:Objective to obtain the biomechanical condition of tibial cross-section under different osteotomy thickness and different activity state, and to provide a theoretical basis for clinical knee arthroplasty osteotomy thickness and guiding postoperative activity. Methods Three-dimensional three-dimensional model of lower extremity osteotomy was reconstructed. According to the principle of total knee replacement osteotomy, the proximal tibial osteotomy was performed to evaluate the material properties of the tibial model after osteotomy, and to analyze the stress of tibial cross-section under standing, walking, running and going upstairs. Results the maximum stress and displacement of tibial osteotomy increased with the increase of osteotomy thickness in the same active state. Conclusion the greater the tibial osteotomy thickness, the stronger the activity intensity and the greater the tibial cross-section stress and strain should be during clinical total knee arthroplasty. The stress and strain of tibial plateau should be reduced and the long life of the prosthesis should be avoided.
【作者单位】：重庆医科大学解剖学教研室;重庆医科大学附属第一医院放射科;
【基金】：重庆市教委项目(KJ120313)
【分类号】：R318.01;R687.4

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