Acetabular cups and methods of their manufacture

Details Acetabular cups and methods of their manufacture Acetabular cups and methods of their manufacture

1997-04-21

1999-03-09

Milano, Michael J.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

A61F 232

Patent

active

058794042

ABSTRACT:
There is described an acetabular cup having an outer shell and an inner liner, which inner liner provides a bearing surface of metallic or ceramic material, wherein there is provided in a position around the rim of the inner liner a shoulder formed of a material that is softer than that used for the head or neck of a femoral component with which the acetabular cup is to be used, which shoulder limits the motion of the femoral component during use. The shoulder may be of a polymeric material such as polyethylene. There is also described an acetabular cup having an inner liner of metallic of ceramic material and an outer shell which is manufactured from a bone cement material. There is further described a method of manufacturing the described acetabular cups which method comprises directly molding the polymeric shoulder of outer shell around the ceramic or metallic inner liner.

REFERENCES:
patent: 3723995 (1973-04-01), Baumann
patent: 4813960 (1989-03-01), Muller
patent: 4969910 (1990-11-01), Frey
patent: 5021062 (1991-06-01), Adrey
patent: 5549693 (1996-08-01), Roux
patent: 5549700 (1996-08-01), Graham
patent: 5639280 (1997-06-01), Warner
patent: 5645594 (1997-07-01), Devanathan
patent: 5658345 (1997-08-01), Willi
patent: 5702478 (1997-12-01), Tornier

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