Reich E, Schmalz G, Federlin M
Poliklinik für Zahnerhaltung und Parodontologie der Universität Regensburg.
Dtsch Zahnarztl Z. 1990 Oct;45(10):656-60.
Direct and indirect composite and ceramic inlays exhibit a space between inlay and tooth, which is filled with a luting composite resin. The aim of the present study was to evaluate the influence of the width of this space upon the quality of the marginal seal of the inlay system. The marginal quality of class II-inlays with small (0.2 mm) and large (0.4 mm) spaces was examined using quantitative SEM analysis and dye penetration. Regular class-II composite fillings served as controls. After thermal and mechanical loading the composite inlays with the wider composite layer showed more marginal gaps than both groups of ceramic inlays. The ceramic inlays did not show a significant deterioration of the margins. The least amount of dye penetration was observed in ceramic inlays with a wider composite layer at the interproximal cavity wall. Composite fillings showed more dye penetration than inlays.
直接和间接复合树脂及陶瓷嵌体在嵌体与牙齿之间会形成一个间隙，该间隙由粘结性复合树脂填充。本研究的目的是评估此间隙宽度对嵌体系统边缘封闭质量的影响。使用定量扫描电子显微镜分析和染料渗透法检查了间隙较小（0.2毫米）和间隙较大（0.4毫米）的Ⅱ类嵌体的边缘质量。常规Ⅱ类复合树脂充填物作为对照。经过热循环和机械加载后，复合层较宽的复合树脂嵌体比两组陶瓷嵌体显示出更多的边缘间隙。陶瓷嵌体边缘未出现明显劣化。在邻面洞壁处复合层较宽的陶瓷嵌体中观察到的染料渗透量最少。复合树脂充填物比嵌体显示出更多的染料渗透。
