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PROSTHETIC JOINT
专利权人:
Douglas Sherman Hawkins
发明人:
Douglas Sherman Hawkins,Mari Susan Truman
申请号:
US13358777
公开号:
US20130197653A1
申请日:
2012.01.26
申请国别(地区):
US
年份:
2013
代理人:
摘要:
A joint prosthesis comprising, e.g., a femoral component and a tibial component. The medial and lateral condylar articular surfaces may have substantially uniform and equal radii from full extension to about 90° of flexion. From 90°, the lateral condylar articular surface has a smaller radius than the medial condylar articular surface such that the medial condyle gradually becomes increasingly more proud than the lateral condyle to facilitate internal rotation of the tibia at deep flexion. Also, the tibial articular component may include a post intermediate the medial and lateral compartments that engages a cam on the femoral articular component between the medial and the lateral condylar articular surfaces. The cam and post become congruent at flexion angles of approximately 70° flexion and mate symmetrically during the first 20°-30° of further flexion, and then mate asymmetrically at greater degrees of flexion to force internal rotation of the tibia.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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