Cushion bearing implants for load bearing applications

Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone

Reexamination Certificate

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Details

C623S022260, C623S022300, C623S022320, C623S022380

Reexamination Certificate

active

07572295

ABSTRACT:
An acetabular implant for use in a hip joint prosthesis is disclosed. The implant includes a body portion comprising a polycarbonate polyurethane. The body portion includes a substantially semispherical inner articulating surface defining a socket sized to receive a head portion of a femoral component of the hip joint prosthesis and an outer engagement surface having an annular protrusion extending outwardly therefrom. The annular protrusion is configured for snap-fit engagement with a corresponding recess in the acetabulum. The implant also includes a deformation control element comprising a polyethylene having an increased durometer hardness relative to the polycarbonate polyurethane and positioned entirely within the body portion between the inner articulating surface and the outer engagement surface.

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