Significant amounts of CaHPO4 · 2H2O (DCPD) were deposited in tooth enamel by pretreatment with a solution saturated with respect to DCPD. When these enamel samples were treated with a given fluoride solution, the fluoride uptake increased with increasing amounts of DCPD produced by the pretreatment. The interactions between enamel and acidic solutions to yield DCPD can be understood as dissolution-precipitation reactions and analyzed through the use of solubility phase diagrams.
References
1.
Chow, L.C., and Brown, W.E.: Incorporation of Fluoride into Tooth Enamel, abstracted, IADR Program and Abstracts of Papers, No. 65, 1971.
2.
Chow, L.C., and Brown, W.E.: The Reaction of Dicalcium Phosphate Dihydrate with Fluoride, J Dent Res52: 1220-1227, 1973 .
3.
Hwu, R.; Young, F.; Amin, K.N.; and Hi-Guchi, W.I.: Kinetics and Mechanisms of the Dicalcium Phosphate Dihydrate → Fluorapatite Conversion in Fluoride, J Dent Res53: (Special Issue) : Abstract No. 574, 1973.
4.
Wei, S.H.Y. , and Tang, T.: Reactions of Dihydrate with Fluoride Solution , J Dent Res (Special Issue) : Abstract No. 575, 1973.
5.
Brown, W.E.: Solubilities of Phosphates and Other Sparingly Soluble Compounds, in Griffith, E.J.; Beeton, A.; Spencer, J.M.; and Mitchell, D.T. (eds): Environmental Phosphorus Handbook, New York: John Wiley and Sons, Inc., 1973, pp 203-239.
6.
Gray, J.A., and Francis, M.D.: Physical Chemistry of Enamel Dissolution, in Sognnaes, R.F. (ed) : Mechanisms of Hard Tissue Destruction , Washington, D.C.: American Association for the Advancement of Science, 1963, pp 253-257.
7.
Mccann, H.G., and Brudevold, F.: The Mechanism of the Caries-Inhibiting Effect of Fluoride, in Kreshover, S.J., and McClure, F.J. (eds) : Environmental Variables in Oral Disease, Washington, DC: American Association of Science, 1966, pp 121-123.
8.
Patel, P.R., and Brown, W.E.: Solubil. ity Behavior of Powdered Human Tooth Enamel at 25 C, abstracted , IADR Program and Abstracts of Papers, No. 801, 1971.
9.
Legeros, R.Z. , and Klein, E.: Brushite Crystals Grown by Diffusion, abstracted , IADR Program and Abstracts of Papers, No. 466, 1972.
10.
Gregory, T.M. ; Moreno, E.C.; and Brown, W.E.: Solubility of CaHPO4·2H2O in the System Ca (OH) 2-H3PO4-H2O at 5, 15, 25 and 37.5 C, J Res Natl Bur Stand74A: 461-475, 1970.
11.
Moreno, E.C. ; Gregory, T.M.; and Brown, W.E.: Preparation and Solubility of Hydroxyapatite , J Res Natl Bur Stand72A: 773-782, 1968.
12.
Moreno, E.C. ; Brown, W.E.; and Osborn, G.: Solubility of Dicalcium Phosphate Dihydrate in Aqueous Systems, Soil Sci Am Proc24: 94-98, 1960.
13.
Caslanska, V.; Brudevold, F.; Vrbic , V.; and Moreno, E.C.: Response of Human Enamel to Topical Application of Ammonium Fluoride, Arch Oral Biol16: 1173-1180, 1971.
14.
Willis, J.B. : The Determinations of Metals in Blood Serum by Atomic Absorption Spectroscopy-I Calcium, Spectrochim Acta16: 259-262, 1960.
15.
Gee, A. , and Deitz, V.R.: Pyrophosphate Formation Upon Ignition of Precipitated Basic Calcium Phosphate , Anal Chem77: 2961-2965, 1954 .
16.
Brudevold, F.; Mccann, H.G.; Nilsson , R.; Richardson, B.;. and Coklica, V.: The Chemistry of Caries Inhibition. Problems and Challenges in Topical Treatments , J Dent Res46: 37-45, 1967.
17.
Hirschman, A.; Sobel, A.E.; Kramer , 0; and Fankuchen , I.: An X-Ray Diffraction Study of High Phosphate Bones, J Biol Chem171: 285-291, 1947.
18.
McCann, H.G. : Determination of Fluoride in Mineralized Tissue Using the Fluoride Ion Electrode, Arch Oral Biol13: 475-477, 1968.
19.
Brudewold, F. : A Study of the Phosphate Solubility of the Human Enamel Surface, J Dent Res27: 320-329, 1948.
20.
Patel, P.R., and Brown, W.E.: Solubility of Intact Human Tooth Enamel at 25 C, abstracted, IADR Program and Abstracts of Papers, No. 177, 1972.
21.
Gregory, T.M., and Brown, W.E.: Equilibrium Constants in the Ternary System Ca (OH) 2-H3PO4-H2O, abstracted , IADR Program and Abstracts of Papers, No. 305, 1972.
22.
Elmore, K.L. , and Farr, T.D.: Equilibrium in the System Calcium Oxide-Phosphorus Pentoxide-Water, Ind Eng Chem32 : 580-586, 1940.
