ISSN:
1432-2021
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Abstract It is stated that all the synthetic carbonate-hydroxyapatites, produced with the reaction of H3PO4 and Ca(OH)2 solutions, are B type carbonate-apatites. The carbonate content of these is completely eliminated up to 900° C. In dental enamels taken from the healthy teeth of females, the carbonate ions occupy different positions (A–B type carbonate-apatite). Those which are parallel to axis c are decomposed only above 900° C. It was found that the natural ageing of dental enamels is in correlation with the different CO 3 2− /H2O ratio measured in these samples. Similar differences were observed between enamels taken from different parts of the tooth and the dentin. The change of the apatite composition after fluoride painting has been established by infrared (IR), derivatographic and X-ray methods.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00308394
