Method and apparatus for providing a modular acetabular prosthesis

An acetabular prosthesis for implantation in an acetabulum and surrounding pelvis, said acetabular prosthesis comprising:

• an acetabular cup having an outer surface operable to be received in the acetabulum, an inner surface operable to receive a bearing liner, and an annular region extending between said outer surface and said inner surface;
• an attachment plate extending from said annular region, said attachment plate defining an internal channel having an internal key positioned within said internal channel;
• and
• a modular attachment component having an attachment member and an engagement member, said attachment member operable to be slidably received within said channel and positioned about said internal key and said engagement member operable to engage a region of the acetabulum, wherein upon said attachment member being slidably received in said channel, said modular attachment component is inhibited from rotational movement relative to said acetabular cup.

An acetabular prosthesis for implantation in an acetabulum and surrounding pelvis, said acetabular prosthesis comprising:

• an acetabular cup having an outer surface operable to be received in the acetabulum and an inner surface operable to receive a bearing liner;
• an anti-rotation counterbore defined by said inner surface of said acetabular cup and formed by a recessed sidewall extending from said inner surface;
• at least one slot defined by said acetabular cup and passing through said acetabular cup from said inner surface to said outer surface, said at least one slot located within said anti-rotation counterbore;
• and
• a modular attachment component having an attachment member and an elongated blade, said attachment member operable for use in attaching said modular attachment component to said acetabular cup and said elongated blade operable to pass through said at least one slot to provide intramedullary fixation of said acetabular cup in a region about the acetabulum.

A method for implanting an acetabular prosthesis having a modular attachment component in an acetabulum and surrounding pelvis, said method comprising:

• providing an acetabular cup having an outer surface operable to be received in the acetabulum and an inner surface operable to receive a bearing liner;
• engaging the outer surface of the acetabular cup with a surgically prepared portion of the acetabulum;
• locating a punch guide along the inside surface of the acetabular cup;
• guiding a punch through said acetabular cup and into the acetabulum with the punch guide to form a hole in the acetabulum;
• removing the punch and punch guide from the acetabular cup;
• passing a portion of the modular attachment component through the acetabular cup and into the hole formed by the punch;
• and
• securing the modular attachment component to the acetabular cup within an anti-rotation counterbore formed by a sidewall extending along said inner surface of said acetabular cup and includes at least one bore located within said anti-rotation counterbore and passing through said acetabular cup.