1. Natural Hydroxyapatite-Ti-Dioxide Bone Substitutes.
- Author
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Martinez, C., Krieke, G., Ločs, J., Bērziņa-Cimdiņa, L., Garrido, L., Gilabert, U., and Ozols, A.
- Abstract
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, Ca 5 (PO 4 ) 3 (OH) (HAB), with different weight fractions of TiO 2 , X. The HAB is obtained from pyrolyzed (900 °C) and ground (45-100 μm) fresh bovine bone, which is mixed with TiO 2 , shaped by pressing (200 MPa), and sintered at 1000-1300 °C per 2 hours. The electron microscopy observations and X-ray diffraction analysis show that increasing sintering temperature and X, promote the formation of a nearly continuous TiO 2 matrix, with embedded grains of tri and tetra-calcium phosphates, products of HAB decomposition. Also, the process leads the formation of calcium titanate, CaTiO 3 , which is the phase responsible for the possible sought biological effect. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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