Purpose of the development: Manufacture of implants operating under load (orthopedic artifical limbs and dentures, tooth caps, implants in maxillofacial surgery, artifical joints, fixtures,etc).

Technical characteristic: Characteristics of the coating based on titanium carbonitride: - Hardness, GPa 25...40; - Modulus of elasticity, GPa 170...270; - Adhesion strength, N,up to 50; - Elastic crestitution, %, up to 75; - Constant of friction in air and in physiological solutions 0,12...0,22; - Wear rate, mm[3]/nm 10[-6]...10[-7]; - Surface roughness Rms,nm 0,13...1,5.

The development stage readiness: Tested experimental exploitation order

Description of the development:
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Metals and alloys used in medicine, as a rule, cause rejection reactions, a problem that is partly solved by deposition of a bioactive layer, for example, hydroxyapatite (HA) should be deposited on their surface. It provides reliable fixing with the bone tissue in vivo. But, mechanical (durability, crack resistance) and tribological properties of HA are rather low, which hinders using ceramics as a bone tissue substitute for parts of the musculoskeletal system and root dental implants operating under load. A new approach to designing hard biocompatible thin-film materials possessing high physical-mechanical properties has been developed. Additional elements (Ca, Si, Zr, O) that improve biocompatibility, mechanical and tribological properties are introduced into coatings based on carbide, carbonitride or titanium silicide. The additional componets are introduced by magnetron sputtering of composite targets obtained by selfpropagating high-temperature synthesis (SHS). The main difference of the method as compared with the traditional PVD method is that knock-out and transfer of both metal and nonmetal elements on a substrate take place during the SHS targel ionic bombardment. The metod allows to spray nanostructured thin-film biocompatible coatings on the surface of various medical products made from fluoroplastic, plastic, stainless steel, cobalt and titanium alloys, including capillary-porous branchy titanium coatings. Deposition of multicomponent coatings (five and more elements) in a wide range of chemical compositions is possible. The combination of high mechanical properties with biocompatibility and absence of toxicity has allowed to obtain qualitatively new promising materials. Absence of harmful effects, the coatings' high biocompatibility, thrombus resistance (artifical vessels), adsence of toxicity and various reactivity were shown by results of in-vitro and in-vivo laboratory research on fibroplasts and osteoplasts.

Possibility of transfer abroad:
Licence's sale
Combinated reduction to industrial level

Photo

Country Russia

For additional information turn to:
E-mail: gal@uintei.kiev.ua