Crystal Structure Studies of Human Dental Apatite as a Function of Age

Autor:	Leventouri, Th., Antonakos, A., Kyriacou, A., Venturelli, R., Liarokapis, E., Perdikatsis, V.
Rok vydání:	2008
Předmět:	Condensed Matter - Other Condensed Matter Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	Studies of the average crystal structure properties of human dental apatite as a function of the tooth-age in the range of 5-87 years are reported. The crystallinity of the dental hydroxyapatite decreases with the tooth-age. The a-lattice constant that is associated with the carbonate content in carbonate apatite decreases with the tooth-age in a systematic way, whereas the c-lattice constant does not change significantly. Thermogravimetric measurements demonstrate an increase of the carbonate content with the tooth-age. FTIR spectroscopy reveals both, B and A-type carbonate substitutions with the B-type greater than the A-type substitution by a factor up to ~5. An increase of the carbonate content as a function of the tooth-age can be deduced from the ratio of the v2 CO3 to the v1 PO4 IR modes. Comment: 17 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0806.1233 Zobrazit plný text záznamu View this record from Arxiv