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Journal of Dental Research, Vol 57, 245-254, Copyright © 1978 by International & American Associations for Dental Research Online Journals
ARTICLES |
S. Crisp, I. K. O'Neill, H. J. Prosser, B. Stuart and A. D. Wilson
An infrared spectroscopic study has been made of the development of crystallinity (hopeite) in dental zinc phosphate cements. Crystallization in the bulk of a cement is prevented only by the incorporation, in the liquid, of aluminum which forms complexes with phosphoric acid. The development of surface crystallinity is related to the chemical composition of the cement and the speed of the reaction. No acid phosphates are to be found in the matrix which consists solely of neutral orthophosphates.
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