MEDICAL PROSTHETIC DEVICES PRESENTING ENHANCED BIOCOMPATIBILITY AND WEAR RESISTANCE, BASED ON COBALT ALLOYS AND PROCESS FOR THEIR PREPARATION

Title:

MEDICAL PROSTHETIC DEVICES PRESENTING ENHANCED BIOCOMPATIBILITY AND WEAR RESISTANCE, BASED ON COBALT ALLOYS AND PROCESS FOR THEIR PREPARATION

Document Type and Number:

WIPO Patent Application WO2006038202

Kind Code:

A3

Abstract:

Medical prosthetic devices and in particular femoral head and/or acetabular cup of articular prostheses, made out of a cobalt alloy are submitted to a surface modification in order to obtain the formation of a thin surface layer constituted by Co-Ta and or Co-Nb intermetallic compounds, with the aim of inducing to the prosthetic device enhanced characteristics of biocompatibility, low metal ion release, higher hardness and wear resistance. The process of surface modification is performed by a treatment of the alloy in a molten salt mixture containing a tantalum halide, without applying any electrical field.

Inventors:

SPRIANO SILVIA (IT)
BUGLIOSI SANTE (IT)

Application Number:

PCT/IB2005/053291

Publication Date:

August 10, 2006

Filing Date:

October 06, 2005

Export Citation:

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Assignee:

TORINO POLITECNICO (IT)
SPRIANO SILVIA (IT)
BUGLIOSI SANTE (IT)

International Classes:

A61F2/34; A61F2/38; A61L27/02; A61L27/04; C23C24/02

Foreign References:

US20040068323A1	2004-04-08
EP1398045A1	2004-03-17
EP0555033A1	1993-08-11
US5415704A	1995-05-16
US5498302A	1996-03-12

Other References:

SPRIANO, S. ET AL: "Surface treatment on an implant cobalt alloy for high biocompatibility and wear resistance", WEAR , 259(PT. 2), 919-925 CODEN: WEARAH; ISSN: 0043-1648, 2005, XP004923950

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