%DETAILS% Answer There are no long term effects of etching the teeth before sealant application. The etchant is a strong acid that dissolves the matrix material between the enamel rods that make up the tooth. It is rinsed off within seconds and leaves the tooth with a frosty appearance when dried.
The nature of a resin dental sealant is that it requires a mechanical bond with the tooth, this mechanical bond is achieved between the sealant material and the enamel rods. In the case the tooth was "over etched" that is to say the sealant material is not covering the entire etched surface of the tooth, the minerals in the saliva, and topical fluoride rebuild that area of the tooth to make it as sound as it was before the procedure Shirley Gutkowski, RDH, BSDH shirleygutkowskirdh.com.
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