Tianjin Zhengtian Medical Instrument Co., Ltd

Beijing Naton Medical Technology Research Institute Co. Ltd.

Zhihua Xu

Xiang Dong

Dayong Song

Senyuan Hu

Shufu Xu

A femoral prosthesis and a knee prosthesis are provided. The femoral prosthesis includes a condyle surface having a first surface section contacting a tibial joint surface over a first range of flexion angles and a second surface section contacting the tibial joint surface over a second range of flexion angles; the first range of flexion angles from a first to a second flexion angle; the second range of flexion angles from the second to a third flexion angle; the first flexion angle selected from &#x2212;20&#xb0; to 0&#xb0;, the second flexion angle selected from 45&#xb0; to 75&#xb0;, the third flexion angle selected from 50&#xb0; to 90&#xb0; and the third flexion angle greater than the second flexion angle; the first surface section having a radius of curvature of a constant length, and the second surface section having a radius of curvature that decreases from a front end to the rear end.

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Beijing, China

Zhihua Xu