Fluorine-substituted hydroxyapatite scaffolds hydrothermally grown from aragonitic cuttlefish bones

resumo

Porous hydroxyapatite scaffolds with different levels of fluorine substitution (46% and 85%) on the OH sites were produced via hydrothermal transformation of aragonitic cuttlefish bones at 200 degrees C and calcination at temperatures up to 1200 degrees C. The increasing level of F substitution reduces the kinetics and probably the yield of the reaction. The incorporation of F in the lattice of hydroxypatite caused a lowering of the unit cell volume due to reduction of the length of the a-axis. The crystallites formed were close in size to bone-like apatite and were orientated along the a-axis rather than the c-axis. There was evidence of AB-type carbonated apatite. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

palavras-chave

MECHANICAL-PROPERTIES; CALCIUM PHOSPHATES; CRYSTALLITE SIZE; DENTAL IMPLANTS; FLUORAPATITE; APATITES; COATINGS; HYDROXYLAPATITE; CARBONATE; MAGNESIUM

categoria

Engineering; Materials Science

autores

Kannan, S; Rocha, JHG; Agathopoulos, S; Ferreira, JMF

nossos autores

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