5种充填材料释氟防龋效果的体外评价

Inhibitive effect of five restorative materials on enamel artificial caries

目的:评价5种充填材料充填牙齿后抑制边缘继发龋的性能。方法:50个牛切牙釉质块随机分为5组,分别用GIC、FujiⅡLC、Compoglass F、BeautifilⅡ及Charisma制备出边缘界面缝隙宽度统一为270μm的充填样本,置于部分饱和酸缓冲脱矿液中进行体外脱矿;3 d后分别测定釉质块表面硬度及釉质块表面和洞壁脱矿深度。结果:脱矿后各充填材料组釉质表面硬度均较脱矿前显著降低(P<0.05),降低率依次为:Cha-risma>BeautifilⅡ≈Compoglass F>FujiⅡLC>GIC(P﹤0.05);5种材料组的表面釉质脱矿深度及洞壁釉质脱矿深度依次为:Charisma>BeautifilⅡ≈Compoglass F>FujiⅡLC>GIC(P﹤0.05)。结论:不同充填材料抑制充填物边缘釉质继发龋的能力不同,传统玻璃离子水门汀>树脂增强玻璃离子水门汀>复合体>复合树脂。

AIM： To investigate the cariostatic effects of the fluoridization of five restorative materials in vitro. METHODS ： Enamel blocks of bovine incisors were restored with five restorative materials （ a conventional GIC, Fuji I1 LC, Compoglass F, Beautifi111 and Charisma） respectively with a gap of 270 ~m in width between each filling material and the enamel. Then all samples were immersed in a partially saturated acidic buffer solution at 37 C for 3 days. The surface microhardness of the enamel blocks was measured before and after demineralization and the depth of enamel demineralization was measured using polarization microscope. RESULTS： Enamel surface hardness of all en- amel blocus was significantly reduced after demineralization （ P 〈 0.05 ）, and the order of hardness reduction in the groups was as follows ： Charisma 〉 Beautifil II = Compoglass F 〉 Fuji I1 LC 〉 GIC （ P 〈 0. 05 ）. The order of the depth of enamel demineralization along the surface and the interface near the gap for the 5 materials was as follows ： Charisma 〉 Beautifil II = Compoglass F 〉 Fuji ]I LC 〉 GIC （ P 〈 0.05 ）. CONCLUSION ： The 5 restorative materials possess different cariostatic ability： conventional GIC 〉 compoglass F 〉 resin modified GIC 〉 composite resin.