Description of an evaluation system for knee kinematics in ligament lesions, by means of optical tracking and 3D tomography

摘要

Objective To describe and demonstrate the viability of a method for evaluating knee kinematics, by means of a continuous passive motion (CPM) machine, before and after anterior cruciate ligament (ACL) injury. Methods This study was conducted on a knee from a cadaver, in a mechanical pivot-shift simulator, with evaluations using optical tracking, and also using computed tomography. Results This study demonstrated the viability of a protocol for measuring the rotation and translation of the knee, using reproducible and objective tools (error<0.2mm). The mechanized provocation system of the pivot-shift test was independent of the examiner and always allowed the same angular velocity and traction of 20N throughout the movement. Conclusion The clinical relevance of this method lies in making inferences about the in vivo behavior of a knee with an ACL injury and providing greater methodological quality in future studies for measuring surgical techniques with grafts in relatively close positions.