The intermediate formation of CaHPO4 · 2H2O and its subsequent conversion to Ca5 (PO4)3F or CaF2 may be a major factor in increased fluoride uptake when tooth enamel is pretreated with acid solutions before being exposed to fluoride. To obtain information concerning the form of fluoride incorporation, the reactions of CaHPO 4 ·2H2O with solutions containing various amounts of F-and PO43- ions were studied.
Get full access to this article
View all access options for this article.
References
1.
Aasenden, R. ; Brudevold, F.; and Mccann, H.G.: The Response of Intact and Experimentally Altered Human Enamel to Topical Fluoride, Arch Oral Biol13: 543-552, 1968.
2.
Moreno, E.C. ; Gregory, T.M.; and Brown, W.E.: Preparation and Solubility of Hydroxyapatite , J Res NBS72A: 773-782, 1968.
3.
Farr, T.D.; Tarbutton, G.; and Lewis, JR., H.T. : System CaO-P2O5-HF-H2O: Equilibrium at 25 and 50°, J Phys Chem66: 318-321, 1962.
4.
Gray, J.A., and Francis, M.D.: Physical Chemistry of Enamel Dissolution, in Sognnaes, R.F. (ed) : Mechanisms of Hard Tissue Destruction , Washington, DC: American Association for the Advancement of Science, 1963, pp 253-257.
5.
McCann, H.G., and Brudevold, F.: The Mechanism of the Caries-Inhibiting Effect of Fluoride, in Kreshover, S.J. and McClure, F.J. (ed) : Environmental Variables in Oral Disease, Washington, D.C.: American Association for the Advancement of Science, 1966, pp 121-123.
6.
Patel, P.R., and Brown, W.E. : Solubility Behavior of Powered Human Tooth Enamel at 25°C, abstracted, IADR Program and Abstracts of Papers No. 801, 1971.
7.
Legeros, R.Z., and Klein, E.: Brushite Crystals Grown by Diffusion, abstracted, IADR Program and Abstracts of Papers No. 466, 1972.
8.
Chow, L.C., and Brown, W.E.: Incorporation of Fluoride into Tooth Enamel, abstracted, IADR Program and A6stracts of Papers No. 65, 1971.
9.
Iizuka, Y., and Ohashi, K.: Experiment with Apatites and the Effect of Fluoride- II, Bull Tokyo Dent Coll11: 1-9, 1970.
10.
Duff, E.J.: Orthophosphates, Part II. The Transformations Brushite → Fluorapatite and Monotite → Fluorapatite in Aqueous Potassium Fluoride Solution, J Chem Soc (A), 33-38, 1971.
11.
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.
12.
Moreno, E.C. ; Brown, W.E.; and Osborn, G.: Solubility of Dicalcium Phosphate Dihydrate in Aqueous Systems, Soil Sci Soc Am Proc24: 94-98, 1960.
13.
Willis, J.B. : The Determinations of Metals in Blood Serum by Atomic Absorption Spectroscopy-I. Calcium, Spectrochim Acta16: 259-262, 1960.
14.
Brabson, J.A. ; Dunn, R.L.; Epps , E.A.; Hoff-Man, W.M.; and Jacob, K.D.: Report on Phosphorus in Fertilizers: Photometric Determination of Total Phosphorus, JAOAC41: 517-524, 1958.
15.
McCann, H.G. : Determination of Fluoride in Mineralized Tissue Using the Fluoride Ion Electrode, Arch Oral Biol13: 475-477, 1968.
16.
Wei, S.H.Y. ; and Forbes, W.C.: X-ray Diffraction Analyses of the Reactions Between Intact and Powdered Enamel and Several Fluoride Solutions , J Dent Res47: 471-477, 1968.
17.
Wei, S.H.Y. ; and Forbes, W.C.: Reactions of Powdered Sound Dentin with Several Fluoride Solutions, J Dent Res48: 149-152, 1969.
