Davidson C L, Abdalla A I
Department of Dental Materials Science, Academic Center for Dentistry Amsterdam (ACTA), The Netherlands.
Am J Dent. 1993 Feb;6(1):39-42.
Class II cavities were prepared in extracted human teeth and adhesively restored with one of three different composite systems. Also, for each system samples were made with a light-cured glass ionomer base. Marginal integrity was measured by dye penetration and SEM observation before and after stressing the samples with thermal and mechanical load cycling. Before loading, the bond system in combination with acid etching the dentin provided superior results. Loading did not significantly affect marginal integrity in light-cured glass ionomer lined samples. This was in contrast to unlined resin dentin bonding system/resin composite restorations where loading did deteriorate marginal integrity significantly.
在拔除的人牙上制备Ⅱ类洞型，并用三种不同的复合树脂系统之一进行粘结修复。此外，对于每个系统，均制作了光固化玻璃离子垫底的样本。在对样本进行热循环和机械载荷循环加载前后，通过染料渗透和扫描电子显微镜观察来测量边缘完整性。在加载前，结合酸蚀牙本质的粘结系统提供了更好的结果。加载对光固化玻璃离子垫底的样本的边缘完整性没有显著影响。这与未垫底的树脂-牙本质粘结系统/树脂复合树脂修复体形成对比，在未垫底的修复体中，加载确实会显著降低边缘完整性。
