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US 6,758,864 B2Granted
Cementless prosthetic bearing element
AssigneeBenoist Girard SAS
InventorsJohn Andrew Storer, Richard Eddy Field, Neil Rushton
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AssigneeBenoist Girard SAS
InventorsJohn Andrew Storer, Richard Eddy Field, Neil Rushton
Estimating the term…
The present invention is intended to provide a cementless prosthetic bearing element which has been molded and which is possible to place in an acetabular socket without cement, the outer surface of the backing being provided with elements to assist stabilization and the ingrowth of bone. Thus, the bearing element is cheaper and easier to produce and provides superior location and installation in the bone. According to the present invention a cementless prosthetic bearing element comprises a backing which supports a bearing liner having a bearing surface, the backing being molded from a rigid polymeric material and said bearing liner being made from elastomeric polyurethane material to which the backing is molded with an outer surface which includes a number of raised engagement features provided in directions extending away from and/or towards the outer periphery of the outer surface.
A cementless prosthetic bearing element comprising a backing which supports a bearing liner having a bearing surface, said backing being molded from a rigid polymeric material and said bearing liner being made from an elastomeric polyurethane material and to which said backing is molded with an outer surface which includes a number of raised engagement features in the form of radially extending stakes extending away from and/or towards the outer peripheral rim of the outer surface, wherein the backing outer surface is part spherical and said strakes extend continuously from the outer periphery of the rim towards a polar area of the backing and wherein said backing outer surface includes at least one fin intersecting at least one strake.
A cementless prosthetic bearing element comprising:
Dependencies are inferred from the claim text.