医学
尸体痉挛
下降(航空)
口腔正畸科
股骨
关节稳定性
流离失所(心理学)
初始稳定性
外科
植入
心理学
工程类
病理
航空航天工程
替代医学
心理治疗师
作者
Kyle A. Borque,Jonathan Gold,Stephen J. Incavo,Rupal M. Patel,S. Ismaily,Philip C. Noble
标识
DOI:10.1016/j.arth.2015.01.011
摘要
This study examined the influence of tibio-femoral conformity on anteroposterior (AP) knee stability during stair descent, particularly with a dished cruciate sacrificing (CS) design. A joint simulator simulated stair descent of cadaveric knees. Tibio-femoral displacement was measured. Knees were tested in intact, ACL-deficient, and TKA with cruciate-retaining (CR), CS and posterior-stabilizing (PS) inserts. Loading during stair descent simulation caused femur displacement anteriorly prior to quadriceps contraction. Quadriceps contraction reestablished the initial femoral AP position. During simulated stair descent, AP stability was restored using PS, CR or CS inserts with an intact PCL. The CS design without the PCL did not provide AP stability. Increasing quadriceps force to restore AP stability may explain the clinical findings of pain and fatigue experienced by some patients after TKA.
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