10514 膝過伸展時の靭帯機能の評価(OS2-4【バイオエンジニアリング(4)】)

Abstract

The purpose of this the present study was to measure the in-situ forces in knee ligaments and other soft tissues during knee hyperextension, for the assessment of their mechanical functions. Human fresh cadaveric knee specimens (n=5) were subjected to two types of hyperextension test; a simple hyperextension test, and a combined hyperextension test with proximal force application. In addition, the knee joints with the oblique popliteal ligament (OPL) transected were also subjected to the simple hyperextension test. The 6-DOF motion of, and force/moment applied to the intact knees were recorded during the tests. And, then, the 6-DOF intact knee motion was reproduced after a sequential transection of the ligaments and soft tissues to determine in-situ forces. In response to 10 Nm of extension moment (simple hyperextension test), the OPL force was slightly higher than those in other structures. In-situ forces in the structures remained almost unchanged in response to 10 Nm of extension moment combined with 30 N of proximal force. In the OPL-transected knees, in-situ forces in other structures were slightly increased although no significant deference was observed. These results suggested that the risk of damage to the OPL is higher than other structures in response to hyperextension. It is also suggested that the risk of secondary damage to other structures such as MCL, POL, Capsule, and PCL is increased after the transection of the OPL.