Fig. 5: Polarized light photomicrographs of an L.S ground section of Baseline normal enamel, side A (untreated side) of SDF and PRG groups, and side B (treated side) of SDF and PRG groups. | BDJ Open

Fig. 5: Polarized light photomicrographs of an L.S ground section of Baseline normal enamel, side A (untreated side) of SDF and PRG groups, and side B (treated side) of SDF and PRG groups.

From: Preventing white spot lesions around orthodontic brackets: efficacy of pre-reacted glass-ionomer barrier coat versus silver diamine fluoride: an in vitro study

Fig. 5

A Normal enamel (Baseline) with a prismatic surface enamel layer with substantially normal uniform subsurface enamel (double head arrow), indicating typical enamel mineralization and birefringence. B SDF-A is showing surface demineralization and exhibiting a demineralized enamel band (circled area) with a positive birefringence extending under an intact surface layer (red arrows). Notice the penetration of demineralization into deeper enamel (white arrows). C PRG-A showing surface demineralization with a positive birefringent demineralized enamel band (circled area) under a surface layer that appears intact (red arrows) and extension of demineralization into deeper enamel (white arrow). D SDF-B shows widely distributed areas of remineralized enamel (white arrows) together with small, demineralized areas (blue arrows). E PRG-B showing alternative areas of remineralized enamel (white arrows) together with small, demineralized areas (blue arrows). F SDF-B showing an apparent remineralized surface enamel layer (red arrows). G PRG-B shows the elimination of demineralization with the appearance of a surface remineralized layer (red arrows).

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