Laboratory of Biomechanics, Department of Orthopaedics, University of Heidelberg, Schlierbacher Landstr. 200a, Heidelberg 69118, Germany.
J Biomech. 2010 Apr 19;43(6):1092-6. doi: 10.1016/j.jbiomech.2009.12.016. Epub 2010 Jan 13.
Experimental simulator studies are frequently performed to evaluate wear behavior in total knee replacement. It is vital that the simulation conditions match the physiological situation as closely as possible. To date, few experimental wear studies have examined the effects of joint laxity on wear and joint kinematics and the absence of the anterior cruciate ligament has not been sufficiently taken into account in simulator wear studies. The aim of this study was to investigate different ligament and soft tissue models with respect to wear and kinematics. A virtual soft tissue control system was used to simulate different motion restraints in a force-controlled knee wear simulator. The application of more realistic and sophisticated ligament models that considered the absence of anterior cruciate ligament lead to a significant increase in polyethylene wear (p=0.02) and joint kinematics (p<0.01). We recommend the use of more complex ligament models to appropriately simulate the function of the human knee joint and to evaluate the wear behavior of total knee replacements. A feasible simulation model is presented.
实验性模拟器研究常用于评估全膝关节置换中的磨损行为。模拟条件尽可能接近生理情况至关重要。迄今为止，少数实验性磨损研究已经检查了关节松弛度对磨损和关节运动学的影响，并且在模拟器磨损研究中，前交叉韧带的缺失没有得到充分考虑。本研究旨在研究不同的韧带和软组织模型对磨损和运动学的影响。使用虚拟软组织控制系统在力控制膝关节磨损模拟器中模拟不同的运动限制。应用更现实和复杂的韧带模型，考虑到前交叉韧带的缺失，会导致聚乙烯磨损显著增加（p=0.02）和关节运动学显著改变（p<0.01）。我们建议使用更复杂的韧带模型来适当模拟人体膝关节的功能，并评估全膝关节置换的磨损行为。提出了一种可行的模拟模型。
