MEDICINE-DESTINATION BIOCOMPATIBLE MULTICOMPONENT NANOSTRUCTURAL COATINGS Russian patent published in 2006 - IPC A61L27/02 A61K6/02 

FIELD: medicine-destination materials.

SUBSTANCE: invention relates to biocompatible wear-resistant nanostructural thin-film materials used as coatings when manufacturing implants operated under loading: orthopedic and dental prostheses, coronas, implants used in dentofacial surgery, artificial joints, attachments, etc. These material should possess high strength, resistance to fatigue, wear and corrosion resistance, biocompatibility, and lack of toxicity. Invention provides multicomponent nanostructural coating, which is characterized by high strength, low modulus of elasticity, high strength of cohesion with substrate, low friction coefficient and wear rate, high resistance to elastic destruction deformation and plastic deformation, low surface roughness, negative surface charge in physiological media (4.5<pH<9), bioactive surface, biocompatibility, and lack of toxicity. Such outcome is achieved by following way. Biocompatible multicomponent nanostructural implant coatings are made from titanium carbonitride to which additional components are added improving mechanical and tribological properties of coating and also imparting bioactivity, biocompatibility, and nontoxicity. Summary concentrations of principal and additional elements in the coating are described by following inequation: 1.2 < ΣX_i/ΣYi < 20, where X_i denotes summary concentration of principal elements (Ti, C, N) in the coating and Yi summary concentration of additional elements (Ca, Zr, Si, K, Mn, O, P) in the coating, provided that following contents of elements are used, atomic %: Ti 30-50, C 15-40, N 0.5-30, O 5-25, Ca 0-7, Zr 0-20, Si 0-30, P 0-1.5m Mn 0-1.0, K 0-1.0.

EFFECT: improved specific characteristics of coatings.

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