Fissures are grooves found on the biting surfaces of teeth, occurring in all teeth. However, they are more prominent on the biting surfaces of our back teeth (first and second molars). With deep, narrow fissures, food can become trapped within the fissure as it is difficult to brush and clean, making this area of the teeth more susceptible to developing cavities.
A fissure sealant is a plastic material applied to the deep grooves/fissures of the back teeth (molars). By applying fissure sealants on the biting surface of the teeth, it creates a protective, smooth barrier against plaque and other harmful substances. This eliminates the possibility of food getting trapped and hence reduces the risk of caries.