Prosthetic bearing assembly

Details Prosthetic bearing assembly Prosthetic bearing assembly

A - Human Necessities

61

F

3/105

A61F 2/34 (2006.01) A61F 2/30 (2006.01) A61F 2/46 (2006.01) B25B 27/04 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2033586

ABSTRACT A prosthetic acetabular cup 100 includes a fixation element 102 for introduction into the acetabulum. The fixation element 102 has a concave inner surface with a generally circular base formed in a plane generally perpendicular to the central longi- tudinal axis. A bearing component 7 is formed from a deformable material and has a concave opening therein for receiving a spherical head of a prosthetic femoral component. The bearing component 7 has an outer surface that nests within the concave inner surface of the fixation element 102. A snap lock mechanism is used to lock the bearing component 7 within the fixation element 102 in the axial direction. Both the fixation element 102 and the bearing component 7 include a plurality of circum- ferentially spaced recesses 3, 12 located around a common pitch circle adjacent the generally circular base of the fixation element 102. When aligned, the recesses 3, 12 form a combined recess of predetermined shape for receiving a pin 20 which is inserted therein to prevent relative rotation between the bearing component and the fixation element.

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