When teeth are formed, the biting surface of the back molar teeth should ideally be in the shape of hills and valleys. However, sometimes the teeth are formed in the shape of hills with deep crevices. These deep crevices trap food and bacteria and are often too deep to clean properly. If left, these areas are sure to decay.
To prevent this happening, your dentist will recommend what is called a fissure sealant. This is a simple procedure. The biting surface of the tooth is thoroughly cleaned and then a special dental material is placed in the deep crevice, creating a smooth surface that is easy to clean.
Fissure sealants are normally recommended, if needed, when the adult tooth first comes through. So it is important to bring your child to the dentist regularly from the age of three.