These are plastic coatings applied to the fissures and pits of the surface of the teeth to prevent accumulation of plaque that are causing decay in these areas. They are usually applied as a flowing liquid which is then hardened with a dental curing light. It is a painless procedure which does not require drilling or anesthetic.
Sealants protect the decay of the chewing surfaces on the back teeth. It is most commonly used in children, but it could be for adults too. It was already approved by public health agencies and professional health associations for many years yet only a few people are aware of it.
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