Dissolution characteristics of extrusion freeformed hydroxyapatite-tricalcium phosphate scaffolds.
J Mater Sci Mater Med
; 19(11): 3345-53, 2008 Nov.
Article
em En
| MEDLINE
| ID: mdl-18545944
ABSTRACT
The dissolution behaviour of calcium phosphate filaments made by extrusion freeforming for hard tissue scaffolds was measured. The solubility of filaments with different HA/beta-TCP ratios sintered at temperatures from 1,100 to 1,300 degrees C was measured under simulated physiological conditions (tris buffer solution tris(hydroxyl) methyl-aminomethane-HCl), pH 7.4, 37 degrees C). Calcium and phosphate concentrations were measured separately by inductively coupled plasma (ICP) atomic emission spectroscopy. Surface morphologies and composition before and after immersion were analyzed by SEM and EDS. The results clearly show that as the beta-TCP content increased, the dissolution increased. Higher sintering temperatures, with consequent closure of surface pores, resulted in lower dissolution. Examination of the surface suggested dissolution on preferred sites by pitting.
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Base de dados:
MEDLINE
Assunto principal:
Materiais Biocompatíveis
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Teste de Materiais
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Fosfatos de Cálcio
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Durapatita
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article