Retention and effectiveness of a chemically polymerized pit and fissure sealant after 2 years

Following a single application of a chemically polymerized fissure sealant (Concise Enamel Bond System) 60% of the sealants were present after 2 years of examination. The effectiveness of the treatment was highly significant and the caries reduction, irrespective of the sealant status, was found to be about 50%. The caries reduction was 98% in sealed pairs where the material was fully retained.