Fluoride Delivery to Prevent White Spots During Orthodontic Treatment

Inclusion Criteria: * Planned to receive orthodontic treatment with upper and lower fixed orthodontic appliances (braces) either alone or following a period of functional appliance treatment. * 11-16 years of age inclusive at the start of the fixed orthodontic appliance treatment. * All genders. * Fit and well with no chronic disease necessitating regular hospital follow-up at hospital. * Willing to participate Exclusion Criteria: * Significant disabilities that may affect manual dexterity; * Any medical complication that would contraindicate the use of the fluoride treatments or milk products; * Previous orthodontic treatment except Phase I functional appliance treatment; * From areas that have fluoridated water supply\*; * Full coronal coverage restorations; * More than 2 missing anterior teeth; * Showing signs of systemic illness e.g. fever, cough, loss of taste/smell; * Any abnormality of face, lips e.g. cleft lip and/or palate or craniofacial abnormality or soft tissues of the mouth e.g. aphthous ulcers or connective tissue disorder.