This study aimed to test whether sealing microcavitated ICDAS 3 carious lesions in permanent
molars may be arrested by sealing using two different types of materials; a glass ionomer and
a resin sealant. A Randomized controlled clinical trial was designed. Children between 6 and
12 years old were recruited and a total of 150 ICDAS 3 lesions in first permanent molars were
allocated to one of the two arms of the study. Clinical and radiographic lesion progression
were the main outcome. Integrity of the material and retention were secondary outcomes. A
follow up period of 24 months with check-ups at 6 and 12 months was considered.