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Biomimetic Crystallization of Apatite in a Porous Polymer Matrix

✍ Scribed by Karsten Schwarz; Matthias Epple

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
321 KB
Volume
4
Category
Article
ISSN
0947-6539

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✦ Synopsis

Hydroxyapatite and fluoroapatite were crystallized by double diffusion of two aqueous solutions into a pellet of porous poly(hydroxyacetic acid) (polyglycolide). Distinct morphologies were observed for these calcium phosphate phases. This suggests specific interactions between the growing aggregates and the polymeric matrix (nucleation and growth of crystals). Fluoroapatite gave elongated hexagonal prisms developing multiply branched edges that finally closed into spheres. Hydroxyapatite (from simulated body fluid, SBF) formed hexagonal terraces and compact elongated hexagonal prisms. Such composites of a biodegradable polymer and apatite phases are of interest as potential biomaterials, such as for bone replacement.

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