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Influence of apatite seeds on the synthesis of calcium phosphate cement

Paper ID Volume ID Publish Year Pages File Format Full-Text
13750 897 2002 10 PDF Available
Title
Influence of apatite seeds on the synthesis of calcium phosphate cement
Abstract

This preliminary study explores the seeding effect (using crystalline hydroxyapatite particles) on the setting time, compressive strength, phase evolution, and microstructure of calcium phosphate cements (CPC) based on monocalcium phosphate monohydrate and calcium hydroxide. Experimental results showed that the setting time varies from 5 to about 30 min, as the seed concentration increased from 0 to 20 wt%. The compressive strength of CPC increased from 4 to 17 MPa, followed by decrease to 12 MPa, for the same range of seeds content. The CPC transformed to predominantly apatitic structure within 24 h for all the samples, with or without the seeds. However, increase of the seed concentration improved the final crystallinity of the apatite phase, suggesting nucleation and growth effects during precipitation of CPC from the precursor solution. The microstructure of the resulting apatitic cement showed a change from essentially featureless (or glass-like) to thin, elongated plate-like morphology, as seeds concentration increased. Correlation between microstructural evolution and corresponding compressive strength of seeded CPC is investigated.

Keywords
Calcium phosphate cement; Seeding; Compressive strength; Microstructure
First Page Preview
Influence of apatite seeds on the synthesis of calcium phosphate cement
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 23, Issue 13, July 2002, Pages 2751–2760
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering