The present invention can accelerate natural healing or cell regenerative healing in a manner that does not affect daily life. A knee joint model is constructed by performing three-dimensional analysis of measurement data obtained by measuring the outline shape and the interior space shape of a knee joint part of a subject, the state of transition toward correction for symptom improvement of the knee joint part is continuously or gradually simulated using the knee joint model as a reference, and an exoskeleton mold in which the knee joint part can be finely adjusted in a continuous or gradual manner in the correction direction is designed on the basis of the transition state.
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