The purposes of this study were to obtain estimated need of pit and fissure sealings on 1st molars in 1st grade of primary school children, and estimated rates of retention rate of those sealants after 6 months, 12 months and 24 months.
The need for sealants on 1st molars were assessed in 154 school children of 1st grade primar school. Sealant needed teeth were sealed with sealant, and the retention of sealants were assessed after 6 months, 12 months and 24 months.
The obtained results were as follows;
1. The need rate of pit and fissure sealants on 1st molars in 1st grade primary school children was 57.5%,
and the need rate of males was significantly higher than that of females(P (0.05).
2. The need rate of pit and fissure sealants on upper 1st molars in 1st grade primary school children was
significantly higher than that of lower 1st molars(P (0.01).
3. The retention rates of sealants were 76.6%, 60.4% and 52.3%, after 6 months, 12 months and 24 months, respectively.
4. The retention rate of lower 1st molars after 6 months was higher than that of upper 1st molars.
|