Osseo-inductive metal implants for a living body and the producing method thereof

Abstract

Discussed is a an Osseo-inductive metal implant for a living body having a layer of metal oxide and a layer of bio-active material formed in this order on the surface of the metal implant.

What is claimed is: 
     
         1 . An Osseo-inductive metal implant for a living body comprising a layer of metal oxide and a layer of bio-active material formed in this order on the surface of the metal implant. 
     
     
         2 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said metal implant is composed of titanium of 98 to 99% purity or titanium alloy comprising any one or more of Al, V, Na, Mg, P, Nb, Zr, Sn, Pt and Ta of 0.1 to 15% by weight added to titanium. 
     
     
         3 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said metal implant is composed of cobalt-chromium alloy comprising any one or more of Mo, W, Ni, Mn, C, Si and Fe of 0.1 to 45% by weight added to cobalt-chromium. 
     
     
         4 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said metal implant is composed of any stainless steel selected from a group consisting of 314, 316, 316L and 22-13-5 stainless steel. 
     
     
         5 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said metal implant is composed of zirconium alloy comprising any one or more of Hf of 0.005 to 10% by weight, Nb of 0 to 4% by weight, Sn of 0 to 3% by weight, Mo of 0 to 2% by weight, Fe of 0.1 to 1% by weight, Cr of 0 to 1% by weight, Ni of 0 to 0.1% by weight, Cu of 0 to 0.1% by weight added to zirconium of 90 to 98.5% purity. 
     
     
         6 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said layer of metal oxide is composed of a layer of 3 to 20 nm thick formed by a reaction of the surface of the mechanically processed metal implant with oxygen in the air just after mechanical processing of the metal implant. 
     
     
         7 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said layer of metal oxide is composed of a layer of 50 nm to 20 μm thick as a double structure formed by the layer of porous anodic oxidized coating film of a barrier type. 
     
     
         8 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said layer of bio-active material is composed of any one or more of Li, Na, K, Rb, Cs, Fr, Mg, Ca, Sr, Ba, Ra, Sc, Y, Lu, Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Ga, In, Ti, Sn and Bi. 
     
     
         9 . The Osseo-inductive metal implant for a living body as described in  claim 1 , wherein said layer of bio-active material is 1 nm to 3 μm thick.