Dacić Stefan, Dacić-Simonović Dragica, Zivković Slavoljub, Radicević Goran, Mitić Aleksandar, Stanojević Ivana, Veselinović Aleksandar
Srp Arh Celok Lek. 2009 Sep-Oct;137(9-10):475-81. doi: 10.2298/sarh0910475d.
Quality and durability of enamel/composite interface essentially depend on an adhesive restorative system.
The aim of this study was to evaluate the quality of marginal adaptation of composite adhesive systems to enamel by scanning electron microscopy (SEM), and to analyse the morphology of the enamel surface along margins of composite restorations, following exposure to cariogenic solution.
The study material included 56 extracted human third molars. Class V cavities were prepared with margins at enamel. Cavities were restored with Single Bond/Z250 and Single Bond/Filtek flow, using the total etch adhesive system, and Prompt-L-Pop/Z250 and Prompt-L-Pop/Filtek flow, using the self etch adhesive system. After the restorative procedure, the restorations were submitted to demineralization during 7 and 28 days. Samples were stored in a cariogenic solution (lactic acid, pH 4.5; 0.1 M) at 37 degrees C or in deionized water (the control group). The margins of restorations and perimarginal enamel were examined by scanning electron microscope (SEM). The gap formations around restoration were measured on cervical, occlusal and approximate margins.
The usage of the total etch adhesive system showed statistically significant lower marginal gap width around composite restoration, compared with the self etch system (p < 0.01). The SEM examination also showed perimarginal enamel zones presenting several signs of demineralization and erosion (alteration of rods, porosities) after acting of a cariogenic solution, in both adhesive methods. Less alteration was found on the enamel surfaces not included in the perimarginal zone.
Treating the cavity with 35% phosphoric acid in the total etch system significantly improved the adaptation of the composite resins to enamel, compared with the self etch treatment. Stronger demineralization of the perimarginal enamel in a cariogenic solution was observed around all restorations in both adhesive systems.
牙釉质/复合材料界面的质量和耐久性主要取决于粘结修复系统。
本研究旨在通过扫描电子显微镜（SEM）评估复合粘结系统与牙釉质边缘适应性的质量，并分析复合修复体边缘暴露于致龋溶液后牙釉质表面的形态。
研究材料包括56颗拔除的人类第三磨牙。制备V类洞，边缘位于牙釉质。使用全酸蚀粘结系统，用Single Bond/Z250和Single Bond/Filtek flow修复窝洞；使用自酸蚀粘结系统，用Prompt-L-Pop/Z250和Prompt-L-Pop/Filtek flow修复窝洞。修复术后，修复体在7天和28天内进行脱矿处理。样本储存在37℃的致龋溶液（乳酸，pH 4.5；0.1 M）中或去离子水中（对照组）。通过扫描电子显微镜（SEM）检查修复体边缘和边缘周围的牙釉质。在颈部、咬合面和邻面边缘测量修复体周围的间隙形成情况。
与自酸蚀系统相比，全酸蚀粘结系统在复合修复体周围的边缘间隙宽度在统计学上显著更低（p < 0.01）。SEM检查还显示，在两种粘结方法中，致龋溶液作用后，边缘周围牙釉质区域均出现了脱矿和侵蚀的迹象（釉柱改变、孔隙）。在边缘周围区域以外的牙釉质表面发现的改变较少。
与自酸蚀处理相比，在全酸蚀系统中用35%磷酸处理窝洞可显著改善复合树脂与牙釉质的适应性。在两种粘结系统的所有修复体周围，均观察到致龋溶液中边缘周围牙釉质更强的脱矿现象。
