US 11,883,556 B2
Method for surface treatment of a bio-compatible metal material and implant treated by said method
Olivier Richart, Lagord (FR); and Herve Depery, Annecy le Vieux (FR)
Assigned to SELENIUM MEDICAL, La Rochelle (FR)
Filed by SELENIUM MEDICAL, La Rochelle (FR)
Filed on May 3, 2021, as Appl. No. 17/306,168.
Application 17/306,168 is a division of application No. 16/090,999, filed on Oct. 3, 2018, granted, now 11,058,794.
Prior Publication US 2021/0252187 A1, Aug. 19, 2021
Int. Cl. A61L 27/06 (2006.01); A61C 13/00 (2006.01); C23F 1/38 (2006.01); C23F 1/26 (2006.01); B24C 1/00 (2006.01); A61L 27/56 (2006.01); A61L 27/50 (2006.01); A61C 8/00 (2006.01); B24C 11/00 (2006.01); A61L 27/04 (2006.01)
CPC A61L 27/06 (2013.01) [A61C 8/0012 (2013.01); A61C 8/0013 (2013.01); A61C 13/0007 (2013.01); A61L 27/50 (2013.01); A61L 27/56 (2013.01); B24C 1/00 (2013.01); C23F 1/26 (2013.01); C23F 1/38 (2013.01); A61L 27/042 (2013.01); A61L 2400/12 (2013.01); A61L 2400/18 (2013.01); A61L 2430/02 (2013.01); A61L 2430/12 (2013.01); B24C 11/00 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A biocompatible metal implant made of an alloy of titanium, aluminum and vanadium comprising:
at least one treated surface, said treated surface subject to abrasive mechanical treatment of the surface of said material by means of abrasive grains based on calcium phosphate;
said treated surface subject to acid treatment by soaking, at a temperature above 40° C., said material in a bath comprising sulfuric acid and hydrochloric acid, followed by at least one rinse with demineralized water; and
said treated surface subject to sodium treatment by soaking, at a temperature above 40° C., said material in a sodium hydroxide-based bath having only sodium hydroxide, followed by at least one rinse with demineralized water and by hot air drying,
wherein said biocampatible metal implant treated surface has a macroporosity in the form of cells having dimensions of the order of 50 μm to 250 μm, said cells comprising pores of from 1 μm to 50 μm, and pores with a size of less than a micrometer, homogeneously over the whole of the treated surface, said treated surface having a surface roughness Ra of greater than or equal to 1.90 μm, and
wherein said biocompatible metal implant has undergone a surface treatment, said treated surface of said biocompatible metal implant having contents of aluminum and vanadium that are reduced by at least 30% relative to the initial alloy, measured by EDS analysis.