The lower limb gait analysis is an effective method to quantitatively analyze the biomechanical changes of the internal motion of the knee joint, as well as an effective way to study the occurrence, the development and the intervention of the knee osteoarthritis (KOA). Two kinds of gait analysis experimental systems and their principles are reviewed, as well as the changes of the KOA patients' 3D lower limb gait. Due to the complexity of the lower limb biomechanics and the limitations of the research technology, the technique of the 3D orthopedic insoles is still in the preliminary stage, and there is no consensus with respect to the therapeutic effect of the products, and they have not been mass-produced and used. Therefore, the application principle and the manufacture process of the 3D orthopaedic insoles in the KOA are emphatically discussed. The dynamic and static structures and the changes around the knee joint of patients with the KOA, as being widely used in the design and the production of the 3D orthopaedic insoles, provide an important solution for the early conservative treatment of the KOA. And it can not only meet the dual requirements of comfort and functionality for patients, but also significantly reduce the manufacturing cycle and cost.

knee osteoarthritis  /  gait analysis  /  orthotic devices