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J Korean Acad Pediatr Dent. 2011;38(3): 244-249.
REMINERALIZATION EFFECT OF INTERPROXIMAL CARIES ADJACENT TO GLASS IONOMER RESTORATIONS: IN VITRO STUDY USING QLF
Hyeok-Sang Lee, Hong-Keun Hyun, Ki-Taeg Jang
Department of Pediatric Dentistry, School of Dentistry, Dental Research Institute, Seoul National University
Corresponding Author: Ki-Taeg Jang ,Tel: 02-2072-2682, Email: jangkt@snu.ac.kr
Received: May 9, 2011;  Accepted: August 8, 2011.
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ABSTRACT
This in vitro study compared the remineralization of incipient interproximal caries in the presence of three glass ionomer cements(highly-filled glass ionomer cement, resin-modified glass ionomer cement, compomer) and a resin composite(control). Thirty-two extracted premolars were selected based upon the lack of any visible demineralization. The teeth were coated in a transparent acid resistant nail varnish leaving 3×3 mm square. The teeth were subjected to the demineralizing buffer for 3 days and quantitative light-induced fluorescence(QLF) images of the subjects were taken. Proximal restoration was simulated by placing tooth specimens and the various glass ionomer cements in closed containers with artificial saliva at 37℃ and pH 7.0 with constant circulation. Further QLF images were subsequently taken at 30, 60, and 90 days. The changes of mineral loss(ΔQ) were evaluated by QLF and the change of ΔQ( Δ ΔQ) were compared between groups in order to evaluate the effects of remineralization. All data were analyzed using ANOVA and the post-HOC Dunnett C multiple comparison test at p<0.05. While ΔQ(changes of mineral loss) increased for all treatments, the increases for three glass ionomer groups were significantly higher than that for the resin group at first month period. As time went on, the amount of Δ ΔQ decreased.
Keywords: Glass ionomer cement | Remineralization | Proximal caries | Quantitative light-induced fluorescence (QLF)
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