Massachusetts Institute of Technology

The General Hospital Corporation

Other

Premnath Venugopalan

Edward W Merrill

William H Harris

Murali Jasty

Charles R Bragdon

Daniel O O'Connor

Orhun K Muratoglu

A medical prosthesis for use within the body which is formed of radiation treated ultra high molecular weight polyethylene having substantially no detectable free radicals, is described. Preferred prostheses exhibit reduced production of particles from the prosthesis during wear of the prosthesis, and are substantially oxidation resistant. Methods of manufacture of such devices and material used therein are also provided.

Radiation and melt treated ultra high molecular weight polyethylene prosthetic devices

Radiation melt treated ultra high molecular weight polyethylene prosthetic devices

A medical prosthesis for use within a body which is formed of radiation treated ultra high molecular weight polyethylene having substantially no detectable free radial. Preferred prosthesis exhibits reduced production of particles from the prosthesis during wear of the prosthesis, and are substantially oxidation resistant. Methods of manufacturing wear resistant medical prosthesis and materials used therein are also provided.

Radiation and melt treated ultra high molecular weight polyethylene prosthetic device and method

The present invention relates to a medical prosthesis for use within the body, which is formed of ultra high molecular weight polyethylene having a polymeric structure with less than about 50% crystallinity, less than about 290 &angst; lamellar thickness and less than about 940 MPa tensile elastic modulus, so as to reduce production of fine particles from the prosthesis during wear of the prosthesis. The present invention also relates to methods of manufacture of such devices and material used therein.

Process of making ultra high molecular weight polyethylene prosthetic devices

A medical prosthesis for use within the body which is formed of ultra high molecular weight polyethylene which has a polymeric structure with less than about 50% crystallinity, less than about 290 .ANG. lamellar thickness and less than about 940 MPa tensile elastic modulus, so as to reduce production of fine particles from the prosthesis during wear of the prosthesis, is described. Methods of manufacture of such devices and material used therein are also provided.

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Cambridge, MA, United States of America

Premnath Venugopalan