Ruslan Z. Valiev, Developing nanostructured metals for medical implants with surface modifications

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Ufa State Aviation Technical University, 12 K. Marx street, Ufa, 450008 Russia

Saint Petersburg State University, Universitetskiy prospekt 28, Peterhof, St. Petersburg, 198504, Russia

Nanostructured metals (Ti and Ti alloys, stainless steels, Mg alloys) with enhanced static and fatigue strengths are promising materials for medical implants. The use of a combined severe plastic deformation (SPD) processing, including the recent equal channel angular pressing (ECAP)-Conform technique leads to significant strengthening of metallic rods due to material nanostructuring. In particular, the use of nanoTi rods with enhanced strength and fatigue life have enabled the fabrication of implants with improved design for dentistry and orthopedics. Furthermore, surface modification of nanoTi through chemical etching and bioactive coatings allows for considerable improvement of its biomedical properties and this subject is considered with special attention in the paper. As a result of conducted studies, miniaturized dental implants and nanoTi plates with reduced thickness and enhanced osseointegration were manufactured and successfully tested in clinical trials.