Han S-K Sang-Kuy, Federico Salvatore, Epstein Marcelo, Herzog Walter
Department of Mechanical and Manufacturing Engineering, The University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
J Biomech. 2005 Jan;38(1):179-84. doi: 10.1016/j.jbiomech.2004.03.010.
Abnormal, excessive stresses acting on articular joint surfaces are speculated to be one of the causes for joint degeneration. However, articular surface stresses have not been studied systematically, since it is technically difficult to measure in vivo contact areas and pressures in dynamic situations. Therefore, we implemented a numerical model of articular surface contact using accurate surface geometries. The model was developed for the cat patellofemoral joint. We demonstrated that small misalignments of the patella relative to the femur change the joint contact mechanics substantially for a given external load. These results suggest that misalignment might be studied as one of the factors causing articular cartilage disorder and joint degeneration.
作用于关节表面的异常、过度应力被推测为关节退变的原因之一。然而，由于在动态情况下体内接触面积和压力的测量在技术上存在困难，关节表面应力尚未得到系统研究。因此，我们使用精确的表面几何形状建立了关节表面接触的数值模型。该模型是针对猫的髌股关节开发的。我们证明，对于给定的外部负荷，髌骨相对于股骨的小错位会显著改变关节接触力学。这些结果表明，错位可能是导致关节软骨紊乱和关节退变的因素之一。
