When correctly applied, dental sealants are nearly 100% effective in preventing dental caries on treated teeth. Despite this, and the fact that dental sealants have been widely available since the early 1970s, it is estimated currently that fewer than 20% of the population have dental sealants.
Dental sealants are usually applied in a dentist's office. The dentist or assistant first cleans and dries the tooth to be treated, then paints a thin layer of liquid plastic material on the pits and fissures of the tooth. After application of the plastic liquid, blue spectrum natural light is shined on the applied material for a few seconds to cure the plastic. Alternatively, some brands of sealants cure chemically.
After curing, the plastic becomes a hard, thin layer covering the treated portions of the tooth. Despite the incredible pressures effected on teeth during chewing each day, dental sealants often remain effective for five years or longer, although sealants do wear naturally and should be checked at regular intervals. If sealants wear or become damaged, they can be repaired or replaced simply by applying new sealant material to the worn or damaged portions. Article on dental sealants
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