Sealant is a fine coat of plastic applied to the occlusal surface (surface stressed during mastication) of the molars or premolars to protect them against tooth decay. Frequently these surfaces have natural furrows, facilitating the accumulation of dental plaque, which could end up as tooth decay. Since the furrows are generally finer than the toothbrush bristles, it becomes impossible to dislodge all the food particles during brushing. To alleviate this undesired situation, the dentist seals the furrows to flatten the occlusal surface and prevent debris from lodging there.
Dental sealant is strongly recommended for children between 6 and 14 years of age, especially when their molars/premolars have deep furrows. In general, children and adolescents are more at risk of developing dental caries. However, dental professionals sometimes prescribe dental sealant for adults who are more subject to the development of tooth decay.