Design, processing and characterization of titanium with radial graded porosity for bone implants. (15th November 2016)

• Record Type: Journal Article
• Authors: Torres, Y.; Trueba, P.; Pavón, J.J.; Chicardi, E.; Kamm, P.; García-Moreno, F.; Rodríguez-Ortiz, J.A.
• Is Part Of: Materials & design. Volume 110(2016)
• Page Start: 179
• Page End: 187
• Publication Date: 2016-11-15
• Subjects: Biomaterials -- Functionally graded materials (FGM) -- Microtomography -- Porous material -- Space-holder technique -- Stress shielding; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2016.07.135
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Titanium cylinders with radial graded porosity, which are potentially suitable for biomedical applications (replacement of cortical and trabecular bones involved in different joint and dental restorations), have been developed by a novel uniaxial and sequential compaction device, based on powder metallurgy techniques. The macrostructural, microstructural and mechanical properties of the cylinders were characterized. The microstructure obtained is a new bio-inspired/bio-mimetic approach to solving one of the most important drawbacks of titanium implants, i.e., bone resorption due to the stress-shielding phenomenon. In addition, the developed device has proved to have unique advantages in customizing the structural integrity in conventional powder metallurgy manufacturing in a simple, economic and reproducible manner. Graphical abstract: Highlights: A compaction device was developed to obtain radial graded porosity Ti cylinders, suitable for biomedical applications. The powder metallurgy space-holder technique was applied for that purpose, guaranteeing the structural integrity of the Ti cylinders. The microstructure obtained is a new bio-inspired/biomimetic approach to solve the bone resorption due to the stress-shielding phenomenon.