The role of high-resolution cartilage thickness distribution for contact mechanics predictions in the tibiofemoral joint.

• Tác giả: Robert J Cooper, Gavin A Day, Alison C Jones, Marlène Mengoni, Vithanage N Wijayathunga, Ruth K Wilcox, Jiacheng Yao
• Ngôn ngữ: eng
• Thông tin xuất bản: England : Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine , 2025
• Bộ sưu tập: NCBI
• ID: 689627

Tóm tắt

Subject-specific finite element models of knee joint contact mechanics are used in assessment of interventions and disease states. Cartilage thickness distribution is one factor influencing the distribution of pressure. Precision of cartilage geometry capture varies between imaging protocols. This work evaluated the cartilage thickness distribution precision needed for contact mechanics prediction in models of the tibiofemoral joint by comparing model outputs to experimental measurements for three cadaveric specimens. Models with location-specific cartilage thickness were compared to those with a uniform thickness, for a fixed relative orientation of the femur and tibia and with tibial freedom of movement. Under constrained conditions, the advantage of including location-specific cartilage thickness was clear. Models with location-specific thickness predicted the proportion of force through each condyle with an average error of 5% (compared to 27% with uniform thickness) and predicted the experimental contact area with an error of 21 mm