This prospective randomized clinical trial included 40 orthodontic patients between the ages of 12-17 who were randomly allocated to two groups. Group 1 (Sealant Group) received sealant on the maxillary anterior canines, lateral incisors, and central incisors, with reapplication of the sealant every 3 months. Group 2 (Varnish Group) had MI Varnish applied every 4-6 weeks, without sealant placed on the maxillary anterior teeth. White spot lesion formation was evaluated with standardized digital photographs at two timepoints, T1 (initial appointment before bonding), and T2 (12 months later, with brackets removed). The brackets were removed in order to facilitate an adequate photographic exam. Photographs were analyzed side-by-side at the conclusion of the study with the Enamel Decalcification Index (EDI). The location of WSLs were recorded by tooth type and by region. Oral hygiene was evaluated at T1 and T2.
