Abstract
The purpose of this study was to determine the efficacy of fluoride varnish (5% sodium fluoride, Duraphat®, Colgate) in reverting white spot lesions (WSLs) after fixed orthodontic treatment. This study was a randomized, parallel group, controlled clinical trial. Using saline solution as control, 110 participants (mean age ± standard deviation: 16.6 ± 3.2 years) ranging from 12 to 22 years old were randomly assigned to either the test group (group 1) or the control group (group 2). Application of fluoride varnish or saline was applied onto tooth surfaces with WSLs every month during the first 6 months after debonding. The labial (buccal) surfaces of the teeth were assessed by the use of a DIAGNOdent pen (DD) at the baseline, 3- and 6-month follow-up visits. After 6 months, 96 subjects with a total of 209 study teeth (47 subjects, 104 teeth in group 1; 49 subjects, 105 teeth in group 2) remained. The WSLs had a mean DD reading at baseline of 17.66 ± 5.36 in group 1 and 16.19 ± 5.70 in group 2, which decreased by 5.78 and 2.44, respectively, at the 3-month follow-up visit and decreased by 7.56 and 3.09, respectively, at the 6-month follow-up visit. The mean baseline DD readings in the two groups were similar (t test, P > 0.05). There was statistically significant differences between the mean DD readings of the two groups at the 3-month (P < 0.05) and at the 6-month follow-up visits (P < 0.01). Topical fluoride varnish application is effective in reversing WSLs after debonding and should be advocated as a routine caries prevention measure after orthodontic treatment.
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Acknowledgment
The study was supported by the 11th five-year plan of Chinese Science and Technology R&D Program (No: 2007BA118B01) and the Dental Hospital of Wuhan University (China). The authors wish to thank Dr. Xiong Hui who offered great help to make this study possible.
Conflict of interest
The authors declare that they have no conflict of interest. The authors alone are responsible for the performance and evaluation of the clinical study, as well as for the writing and content of this paper.
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Du, M., Cheng, N., Tai, B. et al. Randomized controlled trial on fluoride varnish application for treatment of white spot lesion after fixed orthodontic treatment. Clin Oral Invest 16, 463–468 (2012). https://doi.org/10.1007/s00784-011-0520-4
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DOI: https://doi.org/10.1007/s00784-011-0520-4