In vitro Enamel and Cementum Fluoride Uptake from Three Fluoride–Containing Composites

Abstract

The incorporation of fluoride into restorations is desirable because of its cariostatic action. The purpose of this study was to determine fluoride release and fluoride uptake by enamel and cementum from three visible light–cured fluoride–containing composites. Seven circular discs of each composite were prepared and the amount of fluoride released into distilled water was determined at daily intervals for 14 days and then after 30, 60 and 90 days. The fluoride concentration in enamel and cementum was determined in three successive depths by an acid etch biopsy procedure. The composite slabs were made and ligated to the enamel and cementum surfaces and the teeth were immersed in synthetic saliva for 7 days. After removal of the composite slabs, three successive biopsies were again performed. Then the teeth were immersed in 1 M KOH for 24 h and similar biopsies done. The fluoride concentrations were adjusted to standardized depths of 10μm, and the total and bound fluoride uptake calculated. The amounts of fluoride released were significantly different among the three composites. The fluoride released decreased sharply after 1 day and then gradually reached a plateau. As for the enamel and cementum fluoride uptake, FluorEver showed the largest uptake followed by FluoroCore and then Pertac–Hybrid.

Comparison of Short-Term in Vitro Fluoride Release and Recharge From Four Different Types of Pit-and-Fissure Sealants

“…These results were significantly higher than those in the control group. Kawai et al obtained the same results for another composite resin they investigated 7) . Our present study concurred with these previous results and found that fluoriderecharge from pit-and-fissure sealants and filling materials on the surface of teeth occurred within a short time and that their application to teeth increased acid resistance on the surface.…”

Effect of pH on the Wettability and Fluoride Release of an Ion-releasing Resin Composite

“…10,12 At this critical pH value, human saliva is unable to be saturated with calcium and phosphate ions. 13 Therefore, it is reasonable to consider that the chemical process that focused on the development of new materials to be used in dentistry must take into account the possibility of extensive fluoride release, following reduction of the pH to lower than 5.5. Physiochemical surface components found to be involved with bacterial adhesion are surface charge (zeta potential), [14][15] hydrophobicity/hydrophilicity, [16][17] surface-free energy (SFE) 17 and surface roughness.…”

Influence of microhardness and fluoride content of tooth structure by fluoride-containing restorative materials

“…수복재에서 유리된 불소는 치면에 흡수되어 탈회에 대한 저항성을 증가시킨다 22) . 불소 유리에 관한 연구들이 유리 량 에 있어 유사한 결과를 보인 반면 4,11,12) , 흡수에 관한 연구결 과는 실험방법과 재료에 따라 그 결과가 다양하게 나타났 다 12,23,24,25) . 치면에 흡수되는 불소에 관한 연구에서 산부식법 23,26) , 편 광현미경 27,28) , 전자탐침 미량분석기법 (Electron Probe Micro-Analysis-EPMA) 27,29) , 미세경도 측정법 30,31,32) 등이 이용되었다.…”

“…치면에 흡수되는 불소에 관한 연구에서 산부식법 23,26) , 편 광현미경 27,28) , 전자탐침 미량분석기법 (Electron Probe Micro-Analysis-EPMA) 27,29) , 미세경도 측정법 30,31,32) 등이 이용되었다. 이러한 방법 중 산부식법은 부식의 깊이를 조 절하기 곤란하고 25) , 산에 잘 견디는 혼성층이 존재하는 경우 불소 농도의 측정이 불가능하다 33) . 또한 편광현미경은 재광 화와 우식저항에 대한 실제적인 양상을 관찰할 수 있는 장 점을 가지고 있지만, 재발성 우식이 진행되는 치아와 수복물 계면에서 불소의 흡수를 측정하기가 곤란한 단점이 있다 28) .…”