Abstract
Resin-modified glass ionomer sealant (Fuji III LC®)w as applied to immature permanent first molars in children who had been under regular dental care since the dental stage of primary dentition at the Clinic of Pediatric Dentistry, Division of Oral Rehabilitation, Hokkaido University Dental Hospital. It was demonstrated that the caries-preventive effects of Fuji III LC® were high. The clinical examination showed the cariostatic rate of 99.0% 1 year and 95.2% 3 years after application. Some caries incidence occurred, however, in surfaces besides the occlusal surfaces that were covered with the sealant material. This finding indicated the need of both additional application to unerupted fissures and other preventive procedures for mesial surfaces to prevent new caries production in immature permanent first molars.
