Journal of the Korean Academy of Pediatric Dentistry 2006;33(1):25-34.
Published online February 28, 2006.
COMPARATIVE STUDY ON FLUORIDE RELEASE AND RE-UPTAKE CAPACITY OF SEVERAL FLUORIDE-RELEASING RESTORATIVE MATERIALS
단국대학교 치과대학 소아치과학교실 
Correspondence:  , 
Abstract
luoride 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,sup>TM three glass ionomer-based restorative material Dyract® AP, Fuji II LC®, Fuji IX GP Fast® Forty discs(6mm diameter and 1mm 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 II LC® and Fuji IX GP 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 II LC® and Fuji IX GP Fast® was increased after fluoride treatment, and diminished with time.
Key Words: Fluoride-releasing material, Fluoride re-uptake, Glass ionomer


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