The aim of the present study is to compare the use of two adhesives for the placement of
occlusal sealants, evaluating their retention on the occlusal surfaces. Methods: A
randomized clinical trial, in Phase IV, triple-blind, with a split mouth study design
will be adopted, which consists of a simple division of the mouth into two parts (right
and left) for the first four permanent molars of each patient, where the placement of the
materials will be on the right / left side of the mouth and contralateral. They will then
be randomly assigned following block randomization procedures with a 1: 1 allocation. 50
participants (6-year-old children) will be considered, and a pair of permanent first
molars homologs will be used for each participant. Inclusion criteria include: children
whose parents accepted their participation in the study and who signed the Informed
Consent, children enrolled in the Pichanaki District school, children who present upper
and / or lower permanent molars with absence of deep caries cavities and caries, graded 0
and 1 according to ICDAS II, Green and Vermillion Simplified Oral Hygiene Index of 1-2,
have a pair of non-cavitated caries-free counterparts, and children with positive
behavior. After selection of patients, the dental sealants will be placed with two
different adhesives: the 8th generation adhesive intervention group (Scotchbond universal
3M) and the 5th generation adhesive control group (Single bond 3M), both sealants will
use the same flowable resin (Tetric N-flow ivoclar vivadent). Results evaluation:
Retention of the sealants will be evaluated at 6, 9 and 12 months. Retention rates of pit
and fissure sealant materials will be analyzed according to the split mouth design. The
study will use the Mc Nemar test to compare the retention of sealants in the intervention
group and the control group at 6, 9 and 12 months. A 95% confidence level will be
accepted. In addition, the Cochrane Q test will be applied to determine if there are
significant differences in survival for each group of sealants through the evaluation
time. The calculation of the survival months of the sealants will be carried out using
the actuarial method (survival tables). Expected conclusion: To identify which of the two
adhesives presents the best retention after 12 months.
