Gladys S, Van Meerbeek B, Inokoshi S, Willems G, Braem M, Lambrechts P, Vanherle G
Department of Operative Dentistry and Dental Materials, Katholieke Universeit te Leuven, UZ St Rafaël, Belgium.
J Dent. 1995 Dec;23(6):329-38. doi: 10.1016/0300-5712(95)98768-x.
The marginal quality of four tooth-coloured inlay systems was clinically investigated and subjected to computer-aided semiquantitative marginal analysis under scanning electron microscopy (SEM) after 3 years of clinical service.
Three of the restoration types were made using the Cerec CAD-CAM apparatus: one was milled from preformed glass ceramic blocks, and the two other inlay types were milled from preformed porcelain blocks. The fourth system was based on an experimental indirect resin composite inlay system. Each inlay type was luted with a different luting resin composite. The clinical evaluation was performed with a mirror and explorer by two clinicians separately, and the marginal analysis was conducted microscopically on replicas (SEM x 200).
After 3 years in situ, all the restorations were clinically acceptable. No recurrent caries was observed. Marginal analysis under SEM detected a high percentage of submargination for all four systems, which suggests that their respective resin composite luting agents were all subject to wear. The percentage of marginal fractures on the enamel side as well as on the inlay side did not increase dramatically compared to the 6-month results.
The first recall after 6 months of clinical service indicated how tooth-coloured inlays behave at their margins. The 3-year results confirmed the early findings, indicating that wear of resin composite lutes is important and present in all systems. The two ceramic materials showed a similar behaviour at the margins. The resin composite inlay performed better at the inlay site than at the enamel site.
对四种牙齿颜色嵌体系统的边缘质量进行临床研究，并在临床使用3年后，在扫描电子显微镜（SEM）下进行计算机辅助半定量边缘分析。
其中三种修复类型使用Cerec CAD-CAM设备制作：一种由预制玻璃陶瓷块铣削而成，另外两种嵌体类型由预制瓷块铣削而成。第四种系统基于一种实验性间接树脂复合嵌体系统。每种嵌体类型都用不同的粘结树脂复合材料粘结。由两名临床医生分别使用镜子和探针进行临床评估，并在复制品上进行显微镜下的边缘分析（SEM×200）。
在位3年后，所有修复体在临床上均可接受。未观察到复发性龋齿。SEM下的边缘分析检测到所有四种系统的边缘下溢百分比都很高，这表明它们各自的树脂复合粘结剂都存在磨损。与6个月时的结果相比，釉质侧和嵌体侧的边缘骨折百分比没有显著增加。
临床使用6个月后的首次复查表明了牙齿颜色嵌体在其边缘的表现。3年的结果证实了早期发现，表明树脂复合粘结剂的磨损很重要，并且在所有系统中都存在。两种陶瓷材料在边缘表现出相似的行为。树脂复合嵌体在嵌体部位的表现优于釉质部位。
