A registration method of 3D profile and motion data of the knee kinematics

In the orthopaedic field, it is important to analyze bone contact area of the femur and tibia with knee motion. A 3D scanner can acquire a profile of the bone, however cannot measure a dynamic motion. While, a 3D electromagnetic sensor can measure only a dynamic motion. So, this study proposes a method that can reproduce the dynamic motion of the knee profile with the 3D scanner and electromagnetic sensors. This study is to propose a registration method of 3D profile and motion data of the knee. In the experiment, the proposed method was applied to a cadaveric knee. The developed system measured the motion of normal and deficient knees. As a result, the proposed method could reproduce the dynamic motion of the bone profile of the both of the knees.