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. 2022 Mar 21;23:10. doi: 10.1186/s40510-022-00404-9

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Fig. 5 — Scanning electron micrographs (× 2000 magnification) of the different experimental groups; a Sound enamel, b Artificially-created white spot lesion (demineralized enamel), c ICON resin-treated white spot lesion, d CPP-ACP-treated white spot lesion, e Universal adhesive resin-treated white spot lesion, f CPP-ACP with subsequent universal adhesive resin-treated white spot lesion