髌股关节紊乱行关节镜手术治疗对髌股关节生物力学改变的三维有限元分析

发布时间：2018-04-06 22:04

本文选题：髌股关节　切入点：有限元分析　出处：《医用生物力学》2017年02期

【摘要】：目的采用三维有限元方法分析关节镜下行外侧髌骨支持带松解、内侧髌骨支持带紧缩手术前后髌股关节应力分布的改变情况。方法建立髌股关节紊乱患者关节镜手术前后髌股关节三维模型,并计算分析在加载200 N载荷下模型在不同屈膝角度(30°、60°、90°、120°)时的髌股关节最大应力和应力分布。结果关节镜术后模型不同屈膝角度的髌股关节最大应力较术前明显减小;术前髌股关节应力集中在髌股外侧关节面,而术后髌股关节应力得到重新分配。结论关节镜下外侧髌骨支持带松解、内侧髌骨支持带紧缩手术后,髌股关节不同屈膝角度的应力得到改善,为关节镜手术方法可以有效恢复髌股关节内外侧关节面压力平衡提供客观理论依据。对于临床上存在力线异常的早期髌股关节紊乱患者,建议应尽早手术干预。
[Abstract]:Objective to analyze the stress distribution of lateral patellar retinaculum and medial patellar retinaculum before and after arthroscopic reduction with 3D finite element method.Methods A three-dimensional model of patellofemoral joint was established before and after arthroscopic operation in patients with patellofemoral disorder. The maximum stress and stress distribution of patellofemoral joint under 200 N loading were calculated and analyzed under different flexion angles of 30 掳(60 掳) and 90 掳(120 掳).Results the maximum stress of patellofemoral joint with different flexion angles was significantly decreased after arthroscopy, the stress of patellofemoral joint was concentrated on the lateral patellofemoral articular surface before operation, and the stress of patellofemoral joint was redistributed after operation.Conclusion the lateral patellar retinaculum is loosened under arthroscopy and the stress of different flexion angles of patellofemoral joint is improved after medial patellar retinaculum compression.It provides an objective theoretical basis for arthroscopic operation to restore the pressure balance of the medial and medial articular surface of patellofemoral joint.For patients with early patellofemoral joint disorder with abnormal force line, surgical intervention should be carried out as soon as possible.
【作者单位】：贵阳中医学院第一附属医院骨科;
【分类号】：R687.4

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