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KMID : 0358920060330010025
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Journal of the Korean Academy of Pedodontics
2006 Volume.33 No. 1 p.25 ~ p.34
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COMPARATIVE STUDY ON FLUORIDE RELEASE AND RE-UPTAKE CAPACITY OF SEVERAL FLUORIDE-RELEASING RESTORATIVE MATERIALS
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Lee Yeon-Ho
Kim Jong-Soo
Yoo Seung-Hoon
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Abstract
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Fluoride released from dental restorative materials effectively declines the incidence and activity of dental caries and inhibits tooth demineralization. This study investigated the fluoride release and uptake characteristics of one composite resin (Z-250™)three glass ionomer-based restorative material (Dyract AP, Fuji Ⅱ LC^(®),Fuji Ⅸ GP Fast^(®)),Forty discs(6 mm diameter and 1 mm height) were prepared for each material. Each disc was immersed in 5ml of distilled water within polyethylene vial and stored at 37℃. The distilled water was changed every 24 hours and the release of fluoride was measured for 31 days. At the end of this period. each specimen was subjected to one of four treatments : (A) no fluoride treatment (control) : (B) application of a fluoride dentifrice (500ppm) for three minutes three times : (C) application of the 1.23% acidulated phosphate fluoride(APF) foam for one minute once: (D) the same regimen as (B), plus application of the APF foam for one minute once. Then, all samples were reassessed for an additional 7 days.
For all samples, the greatest fluoride release was observed after the first day of the study but diminished with time. On the 7th day of the study. fluoride release level was stabilized. Fuji ⅡLC^(®) and fuji ⅨGP Fast^(®) released higher amount of fluoride than other materials: however no statistically significant difference was found from Fuji Ⅱ LC^(®) and Fuji Ⅸ GP Fast^(®). The amount of fluoride of Dyract^(®) AP Fuji ⅡLC^(®) and Fuji ⅨGP Fast^(®) was increased after fluoride treatment, and diminished with time.
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KEYWORD
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Fluoride-releasing material, Fluoride re-uptake, Glass ionomer
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