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KMID : 0358920050320010136
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Journal of the Korean Academy of Pedodontics
2005 Volume.32 No. 1 p.136 ~ p.143
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FLUORIDE RELEASE AND RECHARGE OF GLASS IONOMER CEMENTS
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Bae Ik-Hyun
Kim Jae-Moon
Jeong Tae-Sung
Kim Shin
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Abstract
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The replacement of dental restorations due to secondary caries is a continuing problem in restorative dentistry. The secondary caries can be partly prevented by using fluoride containing dental materials such as glass ionomer cement, which releases and be recharged with fluoride ion acting as a fluoride reservoir.
For the purpose of investigating the behaviors of fluoride release and recharge of conventional and high viscosity glass ionomer cements, the experiment was performed on the seven specimens each from 4 kinds of materials; 1 kind of conventional glass ionomer cement, 2 kinds of high viscosity glass ionomer cements and 1 kind of composite resin. The amount of fluoride release was measured over 7 days with pH／ion meter and fluoride specific electrode. After measuring daily fluoride release, the specimens were recharged with 2% NaF solutions for 4 minutes and measured for 3 days with recharging repeated two consecutive times. The results were as follows :
1. Significantly more fluoride was released at first day after recharge in all materials except Z-100.
2. High viscosity glass ionomer cements released more or nearly equal amount of fluoride after recharge compared with the initial release(P＜0.05).
3. The fluoride release after recharge with 2% NaF solution was in order of Fuji IX, Ketac Fil, Ketac Molar, Z-100.
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KEYWORD
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Glass ionomer, Fluoride, Recharge, Vicker’s hardness, Water absorption
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