Kim W, Voloshin A S
Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, USA.
J Biomech. 1995 Sep;28(9):1025-33. doi: 10.1016/0021-9290(94)00163-x.
Plantar fascia release is an accepted and widely used surgical way to reduce heel pain, however its effect of the load bearing characteristics of the foot is not well studied. A simple biomechanical model is developed here to analyze load bearing mechanism of the foot during the stance phase of the gait cycle. Quasilinearization is used for the system identification, and all model's parameters are determined from the in vivo tests. The model is used to compare the load bearing mechanism of different pathological situations. The results of the study suggest that the plantar fascia carries as much as 14% of the total load on the foot. Its surgical release decreases dynamic loading on the ankle by only 10%. It is also found that the lowering of the arch degenerates the load bearing capacity of the foot. Thus, the plantar fascia plays an important part in the load bearing by the foot and its surgical release should be carefully considered.
足底筋膜松解术是一种公认且广泛应用于减轻足跟疼痛的手术方法，然而其对足部承重特性的影响尚未得到充分研究。本文建立了一个简单的生物力学模型，以分析步态周期站立阶段足部的承重机制。采用拟线性化方法进行系统识别，所有模型参数均通过活体测试确定。该模型用于比较不同病理情况下的承重机制。研究结果表明，足底筋膜承担了足部总负荷的14%。其手术松解仅使踝关节的动态负荷降低10%。还发现足弓降低会使足部的承重能力退化。因此，足底筋膜在足部承重中起着重要作用，其手术松解应谨慎考虑。
