Purpose: To compare the 2-year clinical performance of an experimental resi
n-modified glass ionomer cement sealant (K-512 = Fuji III LC) with that of
a light-cured resin-based sealant (Delton Opaque) in young adults: Material
s and Methods: 14 subjects with 47 K-512 and 41 Delton sealants were recall
ed at 2 years for clinical examination, photographs after enamel etching, i
mpressions and radiographs. Results: K-512 showed 0% complete retention, 62
% partial retention, and 38% nil retention. The corresponding percentages f
or Delton were 32%, 58% and 10%, respectively. There was one instance of fi
ssure caries for K-512 and three for Delton. Sealants deemed to need retrea
tments because of retention failures were 62% for K-512 and 34% for Delton.
The K-512 sealants continued to darken over the study, many becoming sligh
tly darker than the sealed teeth.