Abstract
The anterior cruciate ligament (ACL) is one of strong ligaments in the knee. The ACL has a role to prevent excessive internal rotation and forwarding movement of the tibia. Lachman test is one of manual tests for examining the ACL. An examiner discriminates an injured degree of the ACL by feeling finger stress. Some measurement devices for Lachman test have been reported. However, these devices aim to analyze not the stress but the motion of the knee joint. Therefore, we set the goal of this study to develop a measurement system for the finger stress with force sensor during Lachman test. A quantitative measurement system during Lachman test with force sensor was developed. A basic experiment before numerical analysis of Endpoint revealed that the inclination of force can separate characteristics of string and elastic. Lachman test was measured by using this system on intra-examiner, inter-examiner and nonexpert. This result may indicate that this analysis method and the system have usefulness so that the bimodality or multi-modality were observed over half data. A future work is to apply the injured knees.
