A Computer Model Assessment of the Effect of Hindfoot Alignment on Mechanical Axis Deviation and Ankle Fractures:

Foot & Ankle Orthopaedics

NavenDuggal¹ 

关键词: Mechanical axis deviation;    Hindfoot alignment;    Ankle stress fracture;    Pes planus;   

DOI  :  10.1177/2473011418S00214

学科分类：医学（综合）

来源: Sage Journals

【 摘 要 】

Category:Basic Sciences/BiologicsIntroduction/Purpose:Conventional mechanical axis is calculated from the center of the femoral head to the center of the ankle. Mechanical axis deviation of the lower limb can be associated with a pes planus hindfoot. Malalignment of the lower limb has been shown to increase progression of osteoarthritis of the knee and ankle and decrease joint arthroplasty longevity. Clinically, a pes planus hindfoot has also been seen with patients who present with a stress fracture of the lateral malleolus. This biomechanical study aims to utilize computer modeling to evaluate the hypothesis that altered force transmission on the lateral malleolus with resultant stress fractures in a pes planus model is attributable to mechanical axis deviation.Methods:A free-body diagram of the fibula in single leg stance was generated by modeling the fibula as a uniform cylinder. It includes the axially applied load and a single evertor muscle force as an eccentric load applied to the mid-diaphysis . ...

【 授权许可】

CC BY