Impacts of medial collateral ligament (MCL) stiffness adjustment on knee joint mechanics in mechanically aligned posterior-substituting (PS) total knee arthroplasty (TKA)

被引：0
作者：
Kim, Junseo [1 ]
Jung, Tae-Gon [2 ]
Shin, Taejin [3 ]
Kim, Seonghun [1 ]
Kwak, Dai-Soon [4 ]
Koh, In Jun [5 ,6 ]
Lim, Dohyung [1 ]
机构：
[1] Sejong Univ, Dept Mech Engn, 209 Neungdong Ro, Seoul 05006, South Korea
[2] Osong Med Innovat Fdn, Osong, South Korea
[3] Corentec Co Ltd, Cent R&D Ctr, Seoul, South Korea
[4] Catholic Univ Korea, Catholic Inst Appl Anat, Coll Med, Dept Anat, Seoul, South Korea
[5] Eunpyeong St Marys Hosp, Joint Replacement Ctr, Seoul, South Korea
[6] Catholic Univ Korea, Coll Med, Dept Orthopaed Surg, 1021 Tongil Ro, Seoul, South Korea
来源：
BIOMEDICAL ENGINEERING LETTERS | 2025年 / 15卷 / 02期
关键词：
Total knee arthroplasty (TKA); Medial collateral ligament (MCL) stiffness adjustment; Knee joint mechanics; Multi-body dynamics; Biomechanics; IN-VIVO; EPICONDYLAR OSTEOTOMY; TENSION; LAXITY; BIOMECHANICS; MODEL;
D O I：
10.1007/s13534-025-00463-x
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
To investigate the biomechanical effects of medial collateral ligament (MCL) stiffness adjustments on knee kinematics-medial femoral rollback, femoral rotation, and joint contact forces-in mechanically aligned posterior-substituting (PS) total knee arthroplasty (TKA). A musculoskeletal model simulating squatting was developed using the AnyBody modeling system. A PS-TKA prosthesis was implanted, and MCL stiffness was modified in 20% increments. The effects on femoral rollback, femoral rotation, and joint forces were evaluated. Medial femoral rollback was not significantly affected by changes in MCL stiffness. However, when MCL stiffness exceeded 20% above normal, the pattern and magnitude of lateral femoral rollback were altered compared to other conditions. Increased MCL stiffness also altered internal-external femoral rotation and raised joint contact forces in the medial compartment. Muscle activity was largely unaffected by changes in MCL stiffness, although hamstring activity increased slightly during early flexion (0 degrees-5 degrees) when MCL stiffness exceeded 20%. Excessive MCL stiffness (over 20% above normal) affects lateral femoral rollback and increases joint contact forces, potentially elevating the risk of prosthetic wear. Maintaining MCL stiffness within physiological limits is critical for optimizing outcomes in varus knee TKA.
引用
收藏
页码：455 / 465
页数：11
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