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Nanostructure of Crystal Hydroxyapatite from Fluorosis Affected Enamel : Study of Dental Sciences Base
Bok av Nasution Abdillah Imron
Currently, there is little information available to describe the nanostructure of crystal hydroxyapatite, which contributes to influencing the macro characteristics of fluorosis-affected enamel. This research using Scanning Electron Microscopy/ Energy Disperse X-Ray (SEM/ EDX)and Powder X-ray Diffraction (XRD). The results of this study have demonstrated Fluor concentration were higher in fluorosis enamel and the surface increasingly roughness and porous. The a-axis on fluorosis-affected enamel 9.3786 , and the c-axis 6.8836 . The a-axis on normal enamel 9.4148 , and the c-axis 6.8791 . The grain size of fluorosis-affected enamel 19.59 nm and normal enamel 20.30 nm. The microstrain of fluorosis-affected enamel 31.54% and normal enamel was 20%. This study concluded that Fluor, as a mostly electronegative element, decreases the crystallinity and improves the microstrain of hydroxyapatite. These conditions will influence the strength and stability of fluorosis-affected enamel.