Fluid Dynamics Play a Role In Distributing Ankle Stresses in Anatomic and Injured States:

Foot & Ankle Orthopaedics

Kamran S.Hamid¹ 

关键词: fluid dynamics;    ankle;    injury;    talus;    tibia;    stress;    pressure;    force;    alignment;   

DOI  :  10.1177/2473011416S00042

学科分类：医学（综合）

来源: Sage Journals

【 摘 要 】

Category:Basic Sciences/BiologicsIntroduction/Purpose:In 1976, Ramsey and Hamilton published a landmark cadaveric study demonstrating a dramatic 42% decrease in tibiotalar contact area with only 1 mm of lateral talar shift. An increase in principal stress of at least 72% is predicted based on these findings though the delayed development of arthritis in minimally misaligned ankles does not appear to be commensurate with the results found in dry cadaveric models. We hypothesize that synovial fluid is a previously unrecognized factor that contributes significantly to stress distribution in the tibiotalar joint in anatomic and injured states.Methods:As it is not possible to directly measure contact stresses with and without fluid in a cadaveric model, finite element analysis (FEA) was employed for this study. FEA is a modeling technique used to calculate stresses in complex geometric structures by dividing them into small, simple components called elements. Four test groups were investigated utilizing a fini...

【 授权许可】

CC BY