Division of Biokinesiology and Physical Therapy, Jacquelin Perry Musculoskeletal Biomechanics Research Laboratory, University of Southern California, Los Angeles, California, USA.
Department of Radiological Sciences, University of California, Irvine, California, USA.
J Orthop Res. 2023 Feb;41(2):271-277. doi: 10.1002/jor.25353. Epub 2022 May 16.
The purpose of this study was to determine the influence of frontal and transverse plane rotations of the femur and tibia on peak maximum principal stress in the patellar tendon. Using finite element modeling, patellar tendon stress profiles of eight healthy individuals were obtained during a simulated squatting task (45° of knee flexion). The femur and tibia of each model were rotated 10° (in 2° increments) along their respective axes beyond that of the natural degree of rotation. This process was repeated for the transverse plane (internal and external rotation) and frontal plane (adduction and abduction). Quasi-static loading simulations were performed to quantify peak maximum principal stress in patellar tendon. Internal and external rotations of the femur and tibia that exceeded 4° beyond that of the natural rotation resulted in progressively greater patellar tendon stress (p < 0.05). Incremental femur and tibia adduction and abduction resulted in an increase in patellar tendon stress, but only at the end range of motions evaluated. These results suggest that tibiofemoral rotations in the frontal and transverse planes have the potential to influence patellar tendon stress. In particular, patellar tendon stress is highly sensitive to small degrees of tibia and/or femur motions in the transverse plane.
本研究旨在确定股骨和胫骨在额状面和横断面上的旋转对髌腱最大主应力峰值的影响。采用有限元建模，在模拟深蹲任务（膝关节屈曲 45°）中获得了 8 名健康个体的髌腱应力曲线。每个模型的股骨和胫骨都沿着各自的轴旋转超过其自然旋转度 10°（每次 2°递增）。然后，对横断平面（内旋和外旋）和额状平面（内收和外展）重复该过程。进行准静态加载模拟以量化髌腱的最大主应力峰值。股骨和胫骨的内旋和外旋超过其自然旋转度 4°会导致髌腱应力逐渐增加（p<0.05）。股骨和胫骨的逐渐内收和外展会导致髌腱应力增加，但仅在评估的运动末端范围。这些结果表明，额状面和横断面上的胫股旋转有可能影响髌腱的应力。特别是，髌腱的应力对横断面上胫骨和/或股骨的小角度运动非常敏感。
