Figure 1From: In-vivo durability of a fluoride-releasing sealant (OpalSeal) for protection against white-spot lesion formation in orthodontic patientsa Assessment of sealant integrity was done by black-light illumination, using the fluorescent properties of the OpalSeal. b and c give examples of sealant scores 3 (sealant undamaged/completely preserved), and 1 (<=50% of sealant left).Back to article page