Abstract
In this study, a device is developed for the measurement and adjustment of resultant graft tension of the anterior cruciate ligament (ACL) reconstructed knee in vitro. This device is attached to the tibial surface at the outer distal end of the drill hole for ACL reconstruction, and measures the graft tension via suture, that is coming from the graft and fixed at one end of the device positioned on the axis of the drill hole, by using strain gages. A hollow bolt-nut pair at the suture fixing end provides a level adjusting mechanism for the initial tension adjustment of the graft. The calibration test showed a good linearity and sensitivity, and the effect of the device is examined through the knee extension test and anterior-posterior drawing test for four human cadaveric knees. The graft tension observed by the device showed the ACL/graft tention characteristics that is consistent with past reports by several authors, and it is confirmed the developed device enables us to study the graft tension under the pratical situation of ACL reconstruction quantitatively.
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