Bulk nanostructured metals for advanced medical implants and devices

5th International Conference Recent Trends in Structural Materials

Valiev, Ruslan Z.^1,2 ; Parfenov, Evgeny V.^1 ; Raab, Georgy I.^1 ; Semenova, Irina P.^1 ; Dluho, Ludek^3

Ufa State Aviation Technical University, 12 K. Marx str., Ufa

450008, Russia^1

Saint Petersburg State University, Universitetskiy Prospekt 28, Peterhof, St. Petersburg

198504, Russia^2

Timplant S.r.o., Sjednoceni 77/1, Ostrava - Polanka

CZ 725 25, Czech Republic^3

关键词: Bioactive coatings;    Biomedical properties;    Grain boundary segregation;    Improved designs;    Medical implants;    Metallic material;    Nanostructured metals;    Severe plastic deformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/461/1/012089/pdf
DOI  :  10.1088/1757-899X/461/1/012089

来源: IOP

【 摘 要 】

Nanostructured metals (Ti and Ti alloys, stainless steels, Mg alloys) with enhanced static and fatigue strengths are promising materials for medical implants [1]. The use of severe plastic deformation (SPD) methods leads to significant strengthening of the metallic materials due to their nanostructuring when the formation of ultrafine grains is combined with the formation of nanostructural featuresnano-phased precipitations, grain boundary segregations, nano-twins, etc. [2]. In the present article the recent developments from author and his colleagues on continuous SPD processing, i.e. equal channel angular pressing (ECAP)- Conform techniques, for producing nanostructured CP titanium are considered. The use of nanoTi rods with enhanced strength and fatigue life has 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. 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.