Figure 2.
(A) SEM image of enamel etched with 30% H3PO4 for 30 seconds. (B–C) SEM images of enamel blocks after 5 days of cycle I (B) without and (C) with CS-AMEL hydrogel treatment. Insets show the images at a higher magnification. (D) XRD spectra of etched enamel (black) and repaired enamel blocks after 5 days of cycle I (blue) with and (red) without CS-AMEL hydrogel treatment.