Bearing material of medical implant having reduced wear rate...

Details Bearing material of medical implant having reduced wear rate... Bearing material of medical implant having reduced wear rate...

A - Human Necessities

61

L

A61L 27/50 (2006.01) A61L 27/16 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2595090

Disclosed is a bearing material of a medical implant comprising a polymer such as UHMWPE and a surface active agent that is not covalently bonded to the polymer. The surface active agent includes a hydrophilic moiety or segment, such as an ethoxylated moiety, and a hydrophobic moiety or segment, such as an alkanol, alkenol, aromatic alcohol, alkylamine, alkenyl amine, alkyl aromatic alcohol, alkanoic acid, alkenoic acid, or any combination thereof. The bearing material has a reduced wear rate. Also disclosed is a method of reducing the wear rate of a polymeric bearing material of a medical implant when it articulates against a hard counterface in the presence of synovial fluid, the method comprising providing a surface active agent in the synovial fluid in close proximity to the bearing surface, the hard counterface, or both.

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