公开(公告)号：US3816855A

公开(公告)日：1974-06-18

申请号：US25791072

申请日：1972-05-30

Applicant: NAT RES DEV

Inventor： SALEH B

IPC: A61F2/38 ,  A61F1/24

CPC classification number: A61F2/38 ,  Y10S264/30

Abstract: A prosthetic knee joint device comprises a femoral component in the form of a shell member having two condylar portions with major convex bearing surfaces areas, which portions are bridged at one end by a portion defining a trough between the convex areas. An associated tibial component has similar portions in a platform bearing member defining major concave bearing surface areas and a ridge therebetween. The convex bearing areas are longer than the concave bearing areas and generally U-shaped longitudinally to simulate the corresponding shaping in the natural joint from which the shell member can in fact be derived. The concave bearing areas however simulate the menisci of the natural joint different phases of rotation to provide an optimized congruity between the bearing surfaces during rotation of the predetermined geometry of the prosthesis as compared to the variable geometry in the natural joint.

Abstract translation: 假体膝关节装置包括具有两个具有主凸起轴承表面区域的两个髁部分的外壳构件形式的股骨部件，该部分在一端由在凸区域之间限定槽的部分桥接。 相关联的胫骨部件在平台支承构件中具有相似的部分，其限定主凹入支承表面区域和其间的脊。 凸起的承载区域比凹入的承载区域长，并且大致为U形的纵向以模拟天然接头中相应的成形，壳体构件实际上可由该凹槽导出。 然而，凹形轴承区域模拟天然接头不同旋转相位的弯矩，从而在假体的预定几何形状的旋转期间在天然接头中的可变几何形状之间在轴承表面之间提供优化的一致性。