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. 2025 Dec 11;26:96. doi: 10.1186/s12903-025-07497-8

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© The Author(s) 2025

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Fig. 2 — Temporal changes in DIAGNOdent values (mean ± SD) across four treatment groups over 6 months. Shaded areas represent clinical thresholds: green (0-12) indicates sound enamel, yellow (12-24) indicates initial demineralization. The dashed line at 12 marks the transition threshold. Note the biphasic response pattern in the fluoride varnish group at 3 months. Error bars represent standard deviation; n=10 per group