| IN VITRO STUDY OF DEMINERALIZATION INHIBITION EFFECT AND FLUORIDE UPTAKE INTO ADJACENT TEETH OF LIGHT-CURED FLUORIDE-RELEASING RESTORATIVES |
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Song-Yi Kim, Sung-Chul Choi, Kwang-Chul Kim, Yeong-Chul Choi, Jae-Hong JPark |
| Department of Pediatric Dentistry, School of Dentistry, Kyung-Hee University |
Correspondence:
Jae-Hong JPark, Tel: 02-958-9373, Email: khupedo@khu.ac.kr
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Received: 10 May 2010 • Accepted: 13 August 2010 |
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| Abstract |
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The purpose of this study was to evaluate the effect of light cured fluoride-releasing materials on the inhibition of demineralization. In addition, the pattern of fluoride uptake of adjacent tooth structure was analyzed with EPMA. Eighty intact premolars were restored with FiltekTM Z250(control group, composite), Fuji Filling LCTM(RMGI), Dyract AP®(compomer) and Beautifil II(giomer). Restored teeth were stored in distilled water for 30 days. Then sixty teeth(n=15) were exposed to demineralizing solution(pH 4.3). Demineralized teeth were bisected and polished. The specimens were observed with confocal laser scanning microscope. The depth of outer lesion and the thickness of inhibition zone were measured. Remained twenty teeth(n=5) were bisected for fluoride uptake analysis. The fluoride analysis were taken at enamel-restoration interface and dentin-restoration interface by electron probe micro-analyzer. The results are as follows: 1. The depth of outer lesion of Fuji Filling LCTM, Dyract AP, Beautifil II was shallower than that of FiltekTM Z250 at the margin of restoration(p<0.05). 2. The thickness of caries inhibition zone of Fuji Filling LCTM, Dyract AP, Beautifil II was greater than that of FiltekTMZ250 at the margin of restoration(p<0.05). 3. Fuji Filling LCTM, Dyract AP, Beautifil II groups showed the greater fluoride uptake into enamel and dentine around restoration than FiltekTM Z250 group. 4. In dentin the difference of fluoride concentration were greater than in enamel, and Dyract AP showed the greatest fluoride concentration in dentin. |
| Key Words:
Giomer, Fluoride-releasing materials, Electron probe micro-analyzer(EPMA), Confocal laser scanning microscope(CLSM) |
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