Goretti A, Neroni M, Perroud R, Holz J
Département de Prévention et Thérapeutique, Faculté de Médecine, Université de Genève.
Schweiz Monatsschr Zahnmed. 1992;102(6):679-87.
The aim of this in vitro trial was to evaluate the marginal seal and adaptation of gold onlays according to the instrumentation used to prepare the bevels, the quality of margins (as cast vs. polished in the laboratory) and two different finishing procedures (burnishing during or after setting of the cement). For that purpose, 25 freshly extracted human molars were restored with onlays using standardized preparation and fabrication methods. The marginal adaptation of the cemented onlays was evaluated using replicas and scanning electron microscopy. The marginal seal was evaluated on sample sections after a dye infiltration test. In order to improve the marginal fit of gold onlay restorations, it can be recommended to: use diamond burs (Intensiv no. 32 and 37) to prepare the bevels finish and polish restorations in the laboratory except for areas with access to clinically burnish, and polish the margins after setting of the cement.
本体外试验的目的是根据制备斜面所使用的器械、边缘质量（如实验室铸造与抛光）以及两种不同的修整程序（在水泥凝固期间或之后进行打磨）来评估金嵌体的边缘封闭性和适合性。为此，使用标准化的制备和制作方法，用嵌体修复25颗新鲜拔除的人类磨牙。使用复制品和扫描电子显微镜评估粘结嵌体的边缘适合性。在染料渗透试验后，对样本切片评估边缘封闭性。为了改善金嵌体修复体的边缘贴合度，建议：使用金刚石车针（Intensiv 32号和37号）制备斜面；除了可进行临床打磨的区域外，在实验室对修复体进行修整和抛光；并在水泥凝固后对边缘进行抛光。
