In vitro measurement of patellofemoral force after three types of knee replacement
In vitro measurement of patellofemoral force after three types of knee replacement
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DOI：
10.1302/0301-620x.80b5.8460
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发表时间：
1998-09-01
影响因子：
--
通讯作者：
O'Connor, JJ
中科院分区：
文献类型：
--
作者：
Miller, RK;Goodfellow, JW;O'Connor, JJ
采用一种新的非侵入性方法，我们测量了髌股关节的力量（PFF）在尸体膝盖安装在一个钻机模拟负重。在植入三种设计的膝关节假体之前和之后测量屈曲20 °至120 °的PFF。内侧单间室关节置换术与关节轴承假体和保留两个交叉韧带没有引起PFF的显著变化。后交叉韧带保留假体和前交叉韧带分离的关节成形术后，PFF在伸展时减少，在屈曲时增加20%。植入后稳定型假体和分离两个交叉韧带产生的PFF在伸展减少，但保持正常的负载在flexion.There是一个直接的关系PFF和角度与髌腱和胫骨长轴。两种全假体植入导致的髌腱角异常解释了观察到的PFF变化，并显示了髌股关节的力学如何依赖于胫股关节的运动学。
Using a new, non-invasive method, we measured the patellofemoral force (PFF) in cadaver knees mounted in a rig to simulate weight-bearing. The PFF was measured from 20 degrees to 120 degrees of flexion before and after implanting three designs of knee prosthesis.Medial unicompartmental arthroplasty with a meniscal-bearing prosthesis and with retention of both cruciate ligaments caused no significant change in the PFF. After arthroplasty with a posterior-cruciate-retaining prosthesis and division of the anterior cruciate ligament, the PFF decreased in extension and increased by 20% in flexion. Implantation of a posterior stabilised prosthesis and division of both cruciate ligaments produced a decrease in the PFF in extension but maintained normal load in flexion.There was a direct relationship between the PFF and the angle made with the patellar tendon and the long axis of the tibia. The abnormalities of the patellar tendon angle which resulted from implantation of the two total prostheses explain the observed changes in the PFF and show how the mechanics of the patellofemoral joint depend upon the kinematics of the tibiofemoral articulation.