การศึกษาเปรียบเทียบการติดอยู่และการป้องกันฟันผุของวัสดุชนิดแก้วไอโอโนเมอร์กับชนิดเรซินในการเคลือบหลุมร่องฟันกรามถาวรซี่ที่หนึ่ง / พรรณรัตน์ มณีรัตนรังษี = Comparison of retention and caries prevention of glass ionomer and resin-based fissure sealants in first permanent molars / Pannarat Maneeratrangsee
Resin-based pit and fissure sealants have been accepted as a caries preventive strategy since the 1970's. The efficacy in preventing caries has been associated with the duration and degree of sealant retention. Placement of the resin is very technique-sensitive. Caries may occur in fissure where the sealant is badly adapted, partially lost or totally lost. Glass ionomer cement sealant may offer additional advantages due to its ability to bond chemically to enamel and release fluoride to prevent the development of caries. The aim of this study is to compare the retention and caries preventive effect of a GIC and resin-based sealant. Fuji IXGP was tested against a visible light cured resin-based material (Delton) using a split mouth design. Bangkok schoolchildren (n=90), age 7-9 y., received sealants on the pit and fissure of sound homologous permanent first molar pairs (upper molars = 85 pairs, lower molars = 32 pairs). Test (GIC) and control (resin) sealants were systemically allocated to left and right side by simple random sampling, and were placed by one dentist. After 6 and 12 months, the retention of the sealants was checked clinically. Caries registration were done at 12 months by one dentist. Intraexaminer agreement was calculated as a Kappa index. Kappa index value was 0.99. In upper first permanent molars, 47% of GIC and 66.7% of resin-based sealants were totally present after 6 months. At 12 months, the retention rates were 18.2% and 36.4%, respectively. None of the sealants was totally lost. The retention of these two materials was significantly different at 6 and 12 months (p=.042 and .028, respectively). In lower first permanent molars, 24% of GIC and 36% of resin-based sealants were totally present after 6 months. At 12 months, the retention rates were 0% and 8%, respectively. None of the sealants was totally lost. There was no significant difference in retention of these two materials (p=.05) at 6 and 12 months. In first permanent molars, 40.7% of GIC and 58.2% of resin-based sealants were totally present after 6 months. At 12 months, the retention rates were 13.2% and 28.6%, respectively. The retention of these two materials was significantly different at 6 and 12 months (p=.027 and .013, respectively). At the end of the study, caries was recorded in one of the GIC-sealed upper first molars and in one of the resin-sealed lower first molars. There was no significant difference in carious lesions (p=.05) at 6 and 12 months. This study suggests that the retention and caries preventive effect of glass ionomer cement and resin-based sealant is not significantly different in twelve-month period.