PMID: 15348152Sep 7, 2004Paper

The formation of hydroxyapatite-calcium polyacrylate composites

Journal of Materials Science. Materials in Medicine
K E WatsonP W Brown

Abstract

Tetracalcium phosphate (TetCP, Ca4(PO4)2O) reacts rapidly with polyacrylic acid (PAA). Complete reaction results in the formation of hydroxyapatite (HAp) and calcium polyacrylate. Consequently, this combination of reactants can react to form a dental cement. However, reaction occurs so rapidly that it would be difficult to achieve a homogeneous mixture of reactants suitable for use in restorations. In order to explore extending the working time, the effects of prehydrating the TetCP to form surface layers of HAp on the TetCP particles was explored. Prehydration was found to be an effective means of allowing workability. Therefore, the effects of the proportions of TetCP and PAA, with and without HAp filler, on cement properties were investigated. The extents of the reactions were investigated by X-ray diffraction analysis; the extents of PAA neutralization were studied by Fourier transform infra-red spectroscopy (FTIR); pore structures were determined by mercury intrusion porosimetry; microstructures were observed by scanning microscopy, and compressive strengths were determined. After curing for 17 days at room temperature PAA neutralization was almost complete; however, residual TetCP could be detected by X-ray diffraction an...Continue Reading

Citations

Sep 3, 2010·International Journal of Biomaterials·Rania M KhashabaJames L Borke
Mar 26, 2010·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Kah Ling LowAldo R Boccaccini
Apr 5, 2001·Journal of Biomedical Materials Research·Y E Greish, P W Brown
Jun 21, 2001·Journal of Biomedical Materials Research·M P GinebraJ A Planell
Feb 17, 2006·Journal of Biomedical Materials Research. Part a·Y E GreishC T Laurencin
Aug 12, 2015·Journal of Functional Biomaterials·Sergey V Dorozhkin

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