Ankle Joint Biomechanical Testing

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High ankle sprains are common in contact sport such as football and soccer. A high ankle sprain typically occurs when an external rotation in applied to the ankle in prone position. The type of sprain is characterized by damage to the interosseous membrane between the tibia and fibula. Testing of a full lower leg cadaveric specimen (shank and foot) introduces additional constraints not present in knee joint testing. First, three rigid bodies (tibia, fibula, and talus) must be tracked to determine kinematics of the high ankle joint. Second, a larger specimen must be fastened to the robot for testing. In order to conduct biomechanical testing of the high ankle joint, an external motion tracking system (DMAS7) is being used to track the motion of fibula. Additionally, a customized clamp is currently being designed to suit the needs of the project.

This material was originally published on the website of the Orthopaedic Robotics Laboratory