These are tooth-coloured, flowable fillings that seal off susceptible grooves or surface pits and significantly reduce the chance of decay.
Some people will have much deeper pits and fissures than others, and are therefore more likely to leave decay-causing plaque on the surface of the teeth.
The sealants will inevitably wear down, however teeth are much more susceptible to decay in the first few years after eruption, (as the enamel is initially more porous), and getting through the first few years decay free, will usually mean the tooth never needs filling.
Fissure sealants are mainly used to protect the biting surfaces of permanent molar teeth, as well as pits and grooves on other surfaces Sealants can be placed at any age, however they are most often placed once all permanent first molars have erupted fully (around 8 years of age), although at times they can be placed earlier if the risk of decay is great.
Little or no drilling is required for fissure sealants.