Prevention is better than cure and this also holds true for tooth decay. Fissure sealant is frequently used to prevent tooth decay in those hard to reach places or in deep grooves which are susceptible to plaque build up.
The sealant is a tooth coloured resin coating which is painted onto the biting surfaces of molars. It is hardened using a concentrated beam of ultraviolet light making a permanent protective covering which remains in place for years.
The sealant is usually placed on adult molars soon after they present themselves. First molars come through at about 6 years of age with the second set coming through at around 12 years.