Characterization and Effect of Anatase on Nano- Hydroxyapatite

Studies have shown that microcrystalline HA is known as a substitute "good-builder" with higher calcium absorption. It is a charge of second-generation calcium derived from bovine bone. And it is more effectivethan calcium carbonate in slow bone loss.The composition of the mineral HA stoichiometric be expressed as Ca10 (PO4) 6 (OH)2 with a Ca / P = 1.67 relationship, while the HA deficient in calcium (CDHA) is CA9 (HPO4) (PO4)5(OH), with Ca / P = 1.50. The latter is the one that is considered the most similar to human bones.Biocompatibility tests natural HA (bovine base) and titanium dioxide show regeneration and capillarity after a few weeks.

Nanometric and stoichiometric hydroxyapatite was prepared by wet via. Later, TiO2 anatase was added. The analysis was made on powder with heat treatment at 680°C in Aratmosphere (HA cc) and pills. The powders were subjected to UP and CIP to form pills [7]. The pills %HAcc+%TiO2 were sintered at 850°C. HA cc and TiO2 median size were 175.9 and 293.6 nm, respectively. Using other technique, Kumar et al. [8] reported hardness and elasticity of 15.1 and 0.405 GPa by nano-indentation for a load of 100 mN over a coating of subsequent layers of %HA%TiO2 (25%HA75%TiO2, 50%HA50%TiO2, 75%HA25%TiO2 and HA). These layers were sintered at 900°C during a few minutes with functionally graded successfully. Before, HA was calcined at 800°C for 2 h. HA and TiO2 median size are 7.46 and 1.37 μm, respectively.