Aesthetic improvement of white spot lesions with resin and fluorine paint in orthodontic treatment

White spot lesions (WSL) are common during orthodontic treatment with multibracket appliances and may raise aesthetic concerns. Although fluoride varnish is widely employed, resin infiltration has emerged as a more effective alternative for improving aesthetics and preventing additional enamel demineralization. This study aimed to compare the effectiveness of resin infiltration (Icon®) and fluoride varnish (Flairèsse®) in enhancing the visual appearance of White spot lesions. A randomized controlled trial was conducted involving 38 patients under the age of 17 who exhibited at least one White spot lesion. Color variations (ΔE) were measured at baseline and after six months, with secondary parameters including ICDAS scores and periodontal health indices. The group treated with resin infiltration demonstrated a significant and sustained reduction in ΔE (from 8.81 to 5.19), whereas the fluoride varnish group showed no notable changes (ΔE at six months: 8.46). Furthermore, resin infiltration resulted in lower ICDAS scores, indicating improved lesion stability. These findings suggest that resin infiltration offers superior and enduring aesthetic improvements compared to fluoride varnish, with early intervention during orthodontic therapy producing optimal outcomes. Additional research with long-term follow-up is recommended to confirm these results.