We normally find, pits and fissures on the top surfaces of our grinders. God has given a tooth surface which is slightly rough so it creates natural friction with opposing teeth and helps us in grinding foodstuff. Unfortunately, this can also be a safe place for plaque to accumulate.Simple procedure called Pit and Fissure Application can help us in avoiding decay.This seals those slightly rough areas. Ideally, it is carried out in permanent teeth.