The chewing surfaces of the molar and premolar teeth have grooves – “fissures” — that make them susceptible to decay. These fissures can be deep, and are narrower than a single toothbrush bristle, making them very difficult to clean. When plaque accumulates in these grooves, the acid from bacteria in the plaque attacks the enamel, forming a cavity.
Dental sealants provide extra protection against decay in teeth by providing a smooth surface covering over the fissures. They are a minimally-invasive procedure, do not require the administration of local anaesthetic (ie. are “needle-free”), and you are able to eat straight afterwards and resume your normal daily activities.
The material used to seal the fissures is biocompatible and tooth coloured, so they are also aesthetically very pleasing.