Biocerámicos de dióxido de Ti- Hidroxiapatita Natural

C. MARTINEZ, G. KRIEKE, JANIS LOčS, U. GILABERT, L. GARRIDO, A. OZOLS

Olavarria, Provincia de Buenos Aires

Congreso; XI Congreso Internacional de Cerámica, Vidrio y Refractarios; 2013

ASOCIACIÓN TECNICA ARGENTINA DE CERAMICA

This paper aims to develop a bioceramic that actives the osteogenesis on the surface of Ti implants. This material is a mixture of natural hydroxyapatite, Ca5(PO4)3(OH) (HAb), with different weight fractions of TiO2 (x). The HAb, obtained from pyrolyzed (900 ºC) and ground (45-100 microns) fresh bovine bone, is mixed with TiO2 and shaped by pressing (200 MPa), followed by sintering at 1000-1300 ºC. The increase of sintering temperature and x, according to electron microscopy observations and X-ray diffraction analysis, promotes the formation of a nearly continuous TiO2 matrix with embedded grains of tri and tetra-calcium phosphates, products of HAb decomposition, and the formation of calcium titanate, CaTiO3, which is the phase responsible for the possible sought biological effect.