Biphasic calcium phosphate: A comparative study of interconnected porosity in two ceramics

• Published in: Journal of biomedical materials research. Part B, Applied biomaterials Vol. 84B; no. 1; pp. 1 - 6
• Main Authors: Lecomte, A., Gautier, H., Bouler, J. M., Gouyette, A., Pegon, Y, Daculsi, G., Merle, C.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01-01-2008
• Subjects: Algorithms; Biocompatible Materials - chemical synthesis; Biocompatible Materials - chemistry; biomaterials availability; bioresorbable; calcium phosphate ceramic; Calcium Phosphates - chemical synthesis; Calcium Phosphates - chemistry; Ceramics - chemical synthesis; Ceramics - chemistry; Diffusion; Iodides - chemistry; Mercury - chemistry; Models, Chemical; Permeability; Porosity; Spectrometry, Mass, Electrospray Ionization
• ISSN: 1552-4973; 1552-4981
• DOI: 10.1002/jbm.b.30569

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. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008