NaF 나노튜브가 콤포짓트 레진의 미세구조와 불소이온 유출에 주는 영향

초록

The purpose of this study was to estimate the quantities of fluoride ions from glass ionomer cement(FLC), compomer (DYT) and experimental composite resin containing NaF nanotube(0, 0.5, 1, 1.5%; EXP-1, EXP-2, EXP-3, EXP-4), and to evaluate the effect of NaF nanotube on both fluoride releasing and microstructure of composite resin. Disk-typed specimens were prepared and immersed in 10 ml distilled water(37℃) and fluoride release was measured after specific periods by using the ion-selective electrode(ISE). The amounts of free fluoride ions released from specimens were measured by using the ion chromatography(IC) after 28 days. The microstructure of specimens was examined by the SEM/EDS. The cumulative amount of the fluoride-releasing was decreased FLC, DYT, EXP-4, EXP-3, EXP-2, EXP-1 by turns for 56 days. The fluoride releasing of EXP-1 was little and EXP-4 was showed higher than EXP-2 and EXP-3. After 7 days the fluoride-releasing of the FLC and DYT dropped rapidly, after 30 days the fluoride-releasing of the EXP was gradually increased. Generally, the amount of fluoride-releasing was measured by ISE showed higher than using IC. The ratio of the free fluoride ions of the FLC and DYT and EXP-4 was 33.1 %, 33.6 %, 90 % respectively, the ratio of the EXP-4 which containing 1.5% nanotube was the highest. After 56 days the amount of the fluoride-releasing from the EXP-4 rapidly increased, and it approximates the FLC and DYT.

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