Pendulum test for frictional coefficient of joint
Osteoarthritis (OA) is the most common degenerative joint disease in the field of orthopaedics. In advanced stages of OA, the patients suffer from severe pain, functional limitations in the affected joints, and restriction of mobility. For detecting early OA and the prevention of progression in OA by novel therapeutic strategies, they are important to understand the functional properties of synovial joint and to establish the precise measurement technique. We investigate the frictional properties of OA joint by using pendulum tester.
Hierarchical structure and mechanical properties of ligament
The anterior cruciate ligament is prone to tearing due to abrupt valgus and rotation during intense sports, and natural healing is difficult, so reconstruction and replacement surgery are required. The ligament and bone tissue are not independent tissues, but cortical bone, calcified fibrocartilage, non-calcified fibrocartilage, and ligament from bone tissue to ligament tissue. Divided into hierarchies, they are collectively referred to as enthesis. We investigate the mechanical behaviors of the components in each region by using Raman spectroscopy.
Motion analysis by using motion capture system
Gait analysis is a clinical tool for obtaining quantitative information of the gait of a person to diagnose walking disabilities. Common methods of gait analysis include using cameras to track the position of body-mounted reflective markers, from which information on joint and limb segment motion can be derived. However, such systems are large, expensive and complex. Therefore, measurements are usually restricted to indoor laboratories. We investigate the gait features by using motion capture systems with IMU sensors.