These are fillings applied in the grooves of the biting surface of the teeth for protection against tooth decay.
Tooth decay usually begins in pits and fissures of the teeth, where food and bacteria are more easily trapped and hard to be removed by brushing. The bacteria multiply and tooth decay appears.
Preventive fillings cover those gaps and prevent bacteria from being trapped there. They also release fluoride, which strengthens the tooth structure.
Preventive fillings can be applied since the age of 4-5 years old until adulthood. It is a simple, painless procedure as no drilling or anaesthesia is used. The fillings should be checked by the dentist annually.