Patent ID: 9119724
Filing Date: 2015-09-01
Classification: A61F,Y10S

Abstract:
1. A hip prosthesis having increased stability at extreme ranges of motion comprising a unitary acetabular cup having a non-articulating surface for attachment to an acetabular socket in a pelvic bone and a concave surface located opposite to the non-articulating surface, the non-articulating surface having a circumferential groove adapted to receive an o-ring and located in proximity to a circumferential edge of the acetabular cup and the concave surface having an acetabular cup stem firmly affixed therein and projecting outwardly therefrom, an o-ring sized to fit in the circumferential groove, an acetabular ball firmly affixed to the acetabular cup stem, the acetabular ball having a surface, the concave surface of the acetabular cup and the surface of the acetabular ball are spaced from one another, thereby defining a gap therebetween, a femoral implant for implantation in a medullary canal of a proximal end of a femur, and a femoral cup firmly affixed to a proximal end of the femoral implant, the femoral cup being sized for articulation in the gap, such that the femoral cup has a concave surface sized for articulation on the surface of the acetabular ball and a convex surface opposite the concave surface of the femoral cup sized for articulation on the concave surface of the acetabular cup, the gap being sized and configured to permit said articulation while constraining the femoral cup within the gap throughout an entire range of said articulation of the femoral cup as it articulates within the gap, thereby reducing a risk of dislocation.