Biphasic calcium phosphate: a comparative study of interconnected porosity in two ceramics.
J Biomed Mater Res B Appl Biomater
; 84(1): 1-6, 2008 Jan.
Article
em En
| MEDLINE
| ID: mdl-17907206
ABSTRACT
Interconnection, one of the main structural features of macroporous calcium-phosphate ceramics, contributes to the biological and physicochemical properties of bone substitutes. As no satisfactory method exists for evaluating this feature, analysis was performed to determine the permeability, tortuosity, and equivalent diameter of interconnecting channels, that is the parameters that appear to be representative of the way pores are linked. The testing of two ceramics with similar porosity levels revealed important differences in all three interconnection parameters. One ceramic showed poor permeability, corresponding to a small equivalent diameter for interconnecting channels in conjunction with a high tortuosity factor, while the other displayed high permeability, a large diameter for interconnecting channels, and a low tortuosity factor. The methodology used, which can be applied to the quantification of interconnection in all calcium-phosphate ceramics, constitutes the first step in a complete study of the role of this feature in cellular colonization of the ceramic, matrix dissolution, and drug release from the calcium-phosphate matrix.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Materiais Biocompatíveis
/
Fosfatos de Cálcio
/
Cerâmica
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article