Introduction of fluoride in all the various forms has been the greatest advances in the field of orthodontics. Previous studies have concluded that fluoride is effective in reducing the demineralized lesions or white spot lesions. Fluoride is available in various forms like gels, rinses, varnishes. Fluoride gels or fluoride rinses are effective to reduce the white spot lesion, but they act for a shorter duration. Fluoride varnish is having an advantage over other fluoride forms as they are effective for longer duration and easily acceptable to the patients.