光重合型小窩裂溝填塞材の臨床成績

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  • A Clinical Study on the Retention of Light Cured Pit and Fissure Sealants: over a Three Year Period Results

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The clinical retention and efficacy of light cured pit andfissure resin sealant (Teethmate-A) were evaluated in this study.<BR>The sealant was applied to 81 first permanent molars of thechildren (mean age: 7y5m) who visited the Pediatric Clinic of Tohoku University Dental Hospital. All of the teeth to which the sealant had been applied wereexamined periodically by clinical inspection and exploration for the sealant retention and the occurence of caries on each pit and fissure.<BR>The results were as follows.<BR>1) In the observation carried out after 12 months, the rates of complete retention of the sealant was about 90% on the occlusal surfaces of the upper first molars, while it was 100% on the occlusal surfaces of the lower ones. In the observation carried out after 36 months, however, the rates of complete retention of the sealant were about 60% on both upper and lower first molars.<BR>2) In the observation of the sealant on the smooth surfacesof the first molars carried out after 12 months, the rates of complete retention of the sealant was about 70% on both the lingual groove of upper molars andthe buccal groove of lower ones. In the observation carried out after 36 months, however, they decreased to 30% on both the lingual groove and buccal groove.<BR>3) On the occlusal surfaces of both the upper and lower first molars, the retention rate of the sealant on the mesial pit was lower than that of the sealant on the distal pit.<BR>4) There was no relationship between the status (intact or initial caries) of the teeth at the time of applying the sealant and the retentionof the sealant.<BR>5) The ratio cases keeping up good progress of the sealant during the period from 12 months to 36 months amounted to about 60% on the occlusal surfaces in both the upper and lower first molars. On the other hand, the ratio of cases keeping up good progress of the sealant amounted to about 30% on the smooth surfaces of both upper and lower first molars.

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