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Acetabular cup

  • US 5,879,398 A
  • Filed: 02/14/1995
  • Issued: 03/09/1999
  • Est. Priority Date: 02/14/1995
  • Status: Expired due to Term
First Claim
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1. A first and second acetabular cup prosthesis, each of said first and second acetabular cups having a different outside diameter at a rim thereof, each of said first acetabular cup and said second acetabular cup comprising:

  • a polymeric cup having a cavity for receiving a femoral head; and

    a backing disposed about and attached to said polymeric cup, said backing having a thickness and further having a porous construction defining interstitial pores, said polymeric cup being attached to said backing by penetrating into said pores a predetermined penetration depth;

    at least one of said backing thickness and said penetration depth varying between said first acetabular cup and said second acetabular cup, whereby each of said first acetabular cup and said second acetabular cup have substantially the same stiffness in a radial direction.

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