Impacts of ligament stiffness adjustment on knee joint mechanics in mechanically aligned PS-TKA скачать в хорошем качестве

Impacts of ligament stiffness adjustment on knee joint mechanics in mechanically aligned PS-TKA

In total knee arthroplasty (TKA) for varus knee deformities, managing medial collateral ligament (MCL) tension is a critical aspect that directly influences the success of the surgery. Aim of this study is to investigate the biomechanical effects of medial collateral ligament (MCL) stiffness adjustments on knee kinematics in mechanically aligned posterior-substituting (PS) total knee arthroplasty (TKA). A musculoskeletal model with total knee arthroplasty (TKA) was developed based on a squat model from the AnyBody Managed Model Repository (AMMR) to evaluate medial femoral rollback, femoral rotation, and joint contact forces. A commercially available TKA design (Corentec Co., Ltd., Republic of Korea) was inserted following mechanical alignment principles. The model incorporated 17 ligaments: the medial collateral ligament (MCL), lateral collateral ligament (LCL), medial and lateral patellofemoral ligaments (MPFL, LPFL), and the anterior cruciate ligament (ACL). One of the key findings of this study is that adjusting MCL stiffness directly influences femoral rollback and rotation during knee flexion. Notably, this study provides quantitative data on the changes in femoral rollback and rotation when MCL stiffness is adjusted within a 20 – 40 % range, offering practical guidance for surgeons during intraoperative decision-making. Presented by: Junseo Kim, Department of Mechanical Engineering, Sejong University, Seoul, Republic of Korea (00:00) Introduction to the AnyBody Modeling System (03:35) Junseo Kim's presentation (04:50) Study Background (10:38) Study Materials & Methods (14:02) Validation of Musculoskeletal Model (14:18) Study Results (17:47) Study Discussion & Conclusion (22:44) AnyBody online resources