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1. (WO2002004696) IMPROVING EFFECTIVENESS OF ARTIFICIAL HIP BY GCIB

Pub. No.:    WO/2002/004696    International Application No.:    PCT/US2001/021562
Publication Date: Jan 17, 2002 International Filing Date: Jul 9, 2001
IPC: A61F 2/00
A61F 2/30
A61F 2/34
A61F 2/36
C23C 14/48
C23C 14/50
H01J 37/317
Applicants: EPION CORPORATION
Inventors: KIRKPATRICK, Allen, R.
DIFILIPPO, Vincent
Title: IMPROVING EFFECTIVENESS OF ARTIFICIAL HIP BY GCIB
Abstract:
The application of gas cluster ion beam (GCIB) technology (100) in order to modify the surface of a surgical implant (10) such as components of an artificial hip joint (10), thereby substantially reducing wear debris and osteolysis complications. The approach of the surface modification comprises an atomic level surface smoothing utilizing GCIB (100) to super smooth the femoral heads (10) and/or the surfaces of the acetabular cups (10) to reduce frictional wear at the interface of the bearing surfaces. A reduction in polyethylene debris and metal debris by GCIB (100) smoothing on one or both bearing surfaces of a surgical implant (10) reduces osteolysis, results in a substantial cost savings to the healthcare system, and reduces patient pain and suffering.