The dental enamel apatite appeared to be an approximation to natural hydroxyapatite. There was no positive indication of amorphous inorganic or other inorganic compounds found in dental enamel apatite or natural hydroxyapatite by the analytical techniques used. Heats of reaction of the organic oxidation at 350 C were determined. Heats of reaction were inversely proportional to dental enamel density.
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References
1.
Trautz, O.R. : Crystalline Organization of Dental Mineral , in Miles, A.E.W. (ed) , Structural and Chemical Organization of Teeth, Vol 2, New York: Academic Press, 1967, pp 165-200.
2.
Wicks, C.E.; and Block, F.E.: Thermodynamic Properties of 65 Elements-Their Oxides, Halides, Carbides, and Nitrides, Washington, DC: Bureau of Mines Bulletin no. 605, 1963.
3.
Brown, W.E.; Smith, J.P.; Lehr, J.R.; and Frazier, A.W.: Crystallographic and Chemical Relations Between Octacalcium Phosphate and Hydroxyapatite, Nature (Lond) 196: 1050-1055, 1962.
4.
Young, R.A., and Elliot, J.C.: Atomic-Scale Bases for Several Properties of Apatites, Arch Oral Biol11: 699-707, 1966.
5.
Legeros, J.P. ; Zapanta-Legeros , R.; and Trautz, O.R.: Crystallinity Measurements on Poorly Crystallized Materials Such as Precipitated Apatites , Abstracts of the Annual Meeting of the American Crystallography Association, Cambridge, 1963, p 59.
6.
R. L. Stone Company, Austin, Texas, personal communication.
7.
Smith, M.R.: Calorimetry with DTA: Measurement of Enthalpies of Fusion and Transition of Arsinic Acids, Thermoscope1: 1-4, 1968.
