We expected to change the current views and concepts about remineraliztion and demineralization processes of enamel and hydroxyapatite through this study.
TABLE 2: COMPARISON OF FULL WIDTH HALF MAXIMUM (FWHM) and PEAK VALUES OF HYDROXYAPATITE IN REACTION WITH DIFFERENT ACIDS AND REMINERALIZATION
This might be due to the presence of protonated and un-protonated hydro phosphate groups found on the surface of hydroxyapatite.
The decrease or no change in the peaks, as in the case of hydrochloric acid, shows that there was no change in the chemical structure of hydroxyapatite.
The reason for the appearance of these peaks, in our understanding, could be because the reaction between citric acid and hydroxyapatite was in a transitory stage, as these peaks almost disappeared when the sample was demineralized for 6 days and were similarly absent in case of enamel samples.
As this surface layer is the reason for the ionic substitutions that take place in the oral cavity, leading to interaction between hydroxyapatite in the enamel and different ions like fluoride, calcium, zinc, magnesium, phosphate and carbonate etc.
The figure presents peaks attributed to International Centre for Diffraction Data (ICDD), hydroxyapatite (HA, card no.
The phase of samples was hydroxyapatite and [beta]-tricalcium phosphate.
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