World Journal of Dentistry

Register      Login

VOLUME 2 , ISSUE 4 ( October-December, 2011 ) > List of Articles

RESEARCH ARTICLE

Nanostructure of Crystal Hydroxyapatite from Fluorosis: Affected Enamel

Abdillah Imron Nasution

Citation Information : Nasution AI. Nanostructure of Crystal Hydroxyapatite from Fluorosis: Affected Enamel. World J Dent 2011; 2 (4):321-325.

DOI: 10.5005/jp-journals-10015-1106

Published Online: 01-03-2013

Copyright Statement:  Copyright © 2011; The Author(s).


Abstract

Aims and objectives

To describe the change of surface structure, c-axis, a-axis and grain size of crystal hydroxyapatite on fluorosis enamel.

Materials and methods

This research was carried out the fluorosis and normal enamel specimen by using scanning electron microscopy/ energy disperse X-ray (SEM/EDX) to determine fluor concentration and the surfaces structure of fluorosis enamel, and powder X-ray diffraction (XRD) to determine change of c- and a-axis of hydroxyapatite of fluorosis enamel.

Results

Fluor concentration were higher in fluorosis enamel and the surface increasingly roughness and porous. SEM/EDX also confirmed gaps areas between enamel rods and visible aprismatic zone in some regions. The axis on fluorosis enamel was a-axis = 9.3786 Å and c-axis = 6.8836 Å. The a-axis on normal enamel was = 9.4148 Å and c-axis = 6.8791 Å. Grain size of fluorosis enamel was 19.59 nm and normal enamel was 20.30 nm.

Conclusion

Fluor as most electronegative element changes the c-axis, a-axis, and grain size of crystal hydroxyapatite and generates the internal atomic bonding which influences the stability of enamel strength.


PDF Share
  1. Dental fluorosis: Chemistry and biology. Crit Rev Oral Biol Med 2002;13(2):155-70.
  2. Recent estimates of the abundance of the elements in the earth. Crust US Geological Survey Circular. Washington DC 1980; N0 285.
  3. Volcanoes in Indonesia. Department of Energy and Mineral Resources of the Republic of Indonesia 2008.
  4. Oral Histology and Embryology (3rd ed). St Louis: The Mosby Co 1993.
  5. Glossary of enamel microstructures. Rotterdam 7 June 1999;267-97.
  6. Effect of systemic fluoride and in vitro fluoride treatment on enamel crystals. J Dent Res 2006;85(11):1042-45.
  7. Structures of biologcal minerals in dental research. J Res Natl Inst Stand Technol 2001; 106(6):1035-44.
  8. Basic and Applied Dental Biochemistry (2nd ed). London, New York: Churchill Livingstone 1989.
  9. Apatite: An adaptive framework structure. School of Materials Engineering. Nanyang Technological University. Singapore 639798, 2004.
  10. The effect of changes in apatit, level retention and intrusion fluorine on solubility. Email after Treatment S. insularis. Jakarta: Dissertation. Faculty of Dentistry-University of Indonesia 2006;53-106.
  11. Electronic and crystallographic structure of apatite. Physical Reviews 2003;B67:1341-46.
  12. Structural, vibrational, and mechanical studies of hydroxyapatite produced by wet-chemical methods arVix: 2004, physic.; 0402002 v1.
  13. Electron microscopy and analysis (3rd ed). London: Taylor & Francis 2001.
  14. Dental tissue effects of fluoride. Adv Dent Res 1994;8(1):15-31.
  15. Role of macromolecular assembly of enamel matrix proteins in enamel formation. J Dent Res 2006;85(9):775-93.
  16. Protein characterization of fluorosed human enamel. J Dent Res 1996;75(120):1936-41.
  17. The effect of fluoride on the size and morphology of apatite crystal grown from physiologic solution. J Calf Tissue Int 1998;63:250-57.
  18. Local density calculation of structural and electronic properties for Ca10PO4F2. Computational Materials Science 1998:346-50.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.