Fissure sealants are hard protective coatings that are applied in order to cover and protect the deep grooves (fissures) in our teeth and prevent dental decay. These fissures are most commonly located at the chewing surfaces on back teeth (molars and premolars)
Too much demineralisation without enough remineralisation to repair the enamel layer leads to tooth decay. Fluoride helps prevent tooth decay by making the tooth more resistant to acid attacks from plaque bacteria and sugars in the mouth. It also reverses early decay.