Resins. Resin based fissure sealants (FS) are bonded
to the underlying enamel by the use of the acid etch
technique. Their caries preventive property is based on
the establishment of a tight seal, which prevents leakage
of nutrients to the microflora in the deeper parts of the
fissure. The resin sealants may be either pure resin,composites or compomers, and their polymerisation
may be initiated chemically or by light.