【摘要】 目的 :分析 3种传统玻璃离子水门汀、4种玻璃离子树脂复合体和 1种树脂的释氟能力。方法 :在体外测量每一材料应用含氟凝胶前后各 6周的氟离子释放量。结果 :部分材料在测量初 2d释氟水平高 ,之后迅速下降 ,在 3～ 5周内维持于稳定水平。用含氟凝胶进行氟再吸收后 ,所有材料均有短暂而显著的释氟增加。结论 :新型的复合体同玻璃离子水门汀一样 ,起氟储存库的作用。更多还原

【Abstract】 Objective: To analyze the fluoride release from three conventional glass ionomer cements(GICs: ChemFlex, Fuji IX GP and Ionofil Molar), four polyacid modified resin composites (Dyract AP, Compoglass F, Freedom and F2000) and a resin composite(Ariston pHc). Methods: 5 specimens of each material were prepared in the shape of a cylinder with the diameter of 3 mm and height of 2.7 mm, each speciment was put into 2 ml of artificial saliva at 37 ℃ for 6 weeks. The specimens were transfered into fresh artificial saliva at the intervals of 6 h, 24 h, 48 h and 1 week. Fluoride in the used saliva was measured with a fluoride detector. 6 weeks after set up, each of the specimens was immersed into 2 ml of acidulate phosphate fluoride gel(APF) at 12.3 g/L for 4 min, then put into the artificial saliva and the fluoride was measured as discribed above. Results: Fluoride released from GICs or Compoglass F was more than that from other materials( P <0.05) in 2 d; that from Ariston pHc and other 3 composites was similar( P >0.05). Low fluoride release was kept from 2 d to 5 weeks. After application of APF, fluoride release was increased( P <0.05). Conclusion: Both conventional GICs and compomers may have the effects as fluoride reservoirs.更多还原