高屈曲性を考慮した人工膝関節大腿骨コンポーネントの形状設計に関する研究(機械力学,計測,自動制御)

概要

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Despite of the fact that most artificial knee joints are made in order to imitate the human knee joint, a decreased range of motion due to contracture of the soft tissues and functional deficiencies were reported in postoperative outcome of total knee arthroplasty. Unfortunately, the knee joint after total arthroplasty cannot reproduce completely the kinematics and functions of the physiological knee joint. In this study, a new prosthetic geometry model of the femoral component for achieving deep flexion was developed based on the displacement and rotation as a function of muscle force and soft tissue restraints. The validity of this model was determined by comparing the results with those of the existing design shapes of total knee prostheses. A method for generating the optimal femoral prosthetic shape has been proposed. The optimal shape of the femur exhibited the reduction in the main active muscle force and the strain of the peripheral tissues during knee flexion. The proposed model improved the flexion and extension motion efficiencies of the total knee joint.
一般社団法人日本機械学会の論文
2003-11-25