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Hydrolysis of α-tricalcium phosphate in NaF solutions by K.S. TenHuisen; P.W. Brown is a Engineering article available to read on EtoBox.

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Controlling the incorporation of Na and fluoride in apatite-based dental restoratives and analogs of bone formed under physiologic conditions may be desirable in controlling their long-term in vivo responses. Formation of these analogs was investigated. Hydrolysis of -tricalcium phosphate ( -TCP) was carried out at physiologic temperature in NaF solutions and the solids product(s) were analyzed. -TCP hydrolysis was complete within 48 h and the only solid products identified were apatites. Changes in solution chemistry were determined at 48 h and 4 weeks. Na and Ca concentrations were determined by spectrometric methods, P and F concentrations were determined by ion chromatography; pH values were obtained. The extent of fluoride and sodium incorporation in the apatites formed varied depending on the NaF concentration of the solution. Both increased with increasing NaF concentration. Apatite compositions ranged from Ca (HPO ) (PO ) OH for hydrolysis in water to Ca Na (HPO ) V (PO ) \V F OH W for hydrolysis in 0.1 M NaF solution. The proportions of PO , HPO and OH in Na-and F-containing apatites are indeterminate but obey the equation (y"constant#x). The (Ca#Na)/P ratio of the apatite

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Author

K.S. TenHuisen; P.W. Brown

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0142-9612)

Published

1999

Language

AF

Field

Engineering (Physical Sciences)