Retention Rate of Pit and Fissure Sealant in Permanent First Molars Considered at High Caries Risk

DOI 5 Citations 20 References
  • YOSHIHARA Akihiro
    Department of Preventive Dentistry, School of Dentistry, Niigata University
  • SAKUMA Shihoko
    Department of Preventive Dentistry, School of Dentistry, Niigata University
  • KOBAYASHI Seigo
    Department of Preventive Dentistry, School of Dentistry, Niigata University
  • MIYAZAKI Hideo
    Department of Preventive Dentistry, School of Dentistry, Niigata University

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  • う蝕リスクが高い第一大臼歯のシーラント保持状況

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Abstract

The purpose of this study was to evaluate the retention rate of pit and fissure sealant on permanent 1st molars considered at high caries risk for 6 months up to 3 years. A total of 156 pits and fissures were screened according to 4 indices ; sticky fissure, occlusal plaque level, occlusal status and age. We sealed teeth with resin in 356 primary school children (1st-3rd grades ; 6-9 years old) who had been a school-hased fluoride mouthrinsing program since the age of 4. Retention rates were 75.9-100%, 69.0-96.8% and 58.6% after 6 months, 2 years, and 3 years, respectively. Salivary contamination during operation was the major reason for failure (lower percentages described above) according to multiple regression analysis. For 22 pits and fissures where sealants dropped out, re-sealing was conducted at regular check-ups twice a year. Dental caries was observed in only 4 pits and fissures out of 156 during the survey period. These results suggested that higher retention rate could be obtained by effective cleaning and preventing salivary contamination, even for sticky fissures which were considered at high caries risk.

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