ANTIOXIDANT DOPING OF CROSSLINKED POLYMERS TO FORM NON-ELUTING BEARING COMPONENTS

Methods provide a non-eluting antioxidant doped UHMWPE in the form of an implant bearing component. The process includes the steps of: (a) providing a preform; (b) irradiating the preform with γ-irradiation to crosslink the UHMWPE; (c) doping the crosslinked preform by exposing it to an antioxidant...

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Bibliographic Details
Main Authors SCHROEDER DAVID W, FREEDMAN JORDAN H
Format Patent
LanguageEnglish
Published 29.05.2014
Subjects
BANDAGES, DRESSINGS OR ABSORBENT PADS
COMBINED OPERATIONS
DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS
FILTERS IMPLANTABLE INTO BLOOD VESSELS
FIRST-AID KITS
FOMENTATION
HUMAN NECESSITIES
HYGIENE
MACHINE TOOLS
MEDICAL OR VETERINARY SCIENCE
METAL-WORKING NOT OTHERWISE PROVIDED FOR
ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES
OTHER WORKING OF METAL
PERFORMING OPERATIONS
PROSTHESES
TRANSPORTING
TREATMENT OR PROTECTION OF EYES OR EARS
UNIVERSAL MACHINE TOOLS
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Summary:Methods provide a non-eluting antioxidant doped UHMWPE in the form of an implant bearing component. The process includes the steps of: (a) providing a preform; (b) irradiating the preform with γ-irradiation to crosslink the UHMWPE; (c) doping the crosslinked preform by exposing it to an antioxidant composition at a temperature below the melting point of the UHMWPE; (d) removing the doped material from contact with the antioxidant composition; and then (e) annealing by heating the doped material at a temperature above 30° C. and below the melting point of the UHMWPE; followed by (f) making an implant bearing component from the doped material, wherein at least 1 mm but no more than about 15 mm of material are removed to make the component.
Bibliography:Application Number: US201414171237