Bronwasser P J, Mörmann W H, Krejci I, Lutz F
Abteilung für Präventivzahnmedizin, Parodontologie und Kariologie, Zahnärztliches Institut, Universität Zürich.
Schweiz Monatsschr Zahnmed. 1991;101(2):162-9.
Dicor MGC Cerec inlays were placed in 53 teeth clinically and in 24 extracted teeth. Both main groups were subdivided into the following four test subgroups: 1. monofunctional dentin adhesive without linings. 2. bifunctional dentin adhesive without linings. 3. monofunctional dentin adhesive with linings. 4. bifunctional dentin adhesive with linings. The marginal adaptation of the occlusal surfaces of the restorations placed clinically was evaluated from replicas using the scanning electron microscope at x 200 magnification. In contrast, the marginal adaptation of all the restored enamel surfaces and the disto-cervical dentinal margins of the restorations placed in the extracted teeth were similarly evaluated. These margins were examined before and after thermomechanical stressing. The restorations were stressed 120,000 times at 300 cycles of 5-55-5 degrees C, chemically degraded by immersion in ethanol of 75% for 20 h and brushed for 30 min with a toothbrush at 1,96 N load. The in-vitro restorations were also subjected to dye penetration tests. The percent "excellent margin" recorded along the enamel-composite interface of the occlusal surfaces of the clinically placed restorations varied between 83.6 and 88.2%. The corresponding scores for the in-vitro specimens were at least 95% before and 90% after the thermomechanical and chemical stressing. The bifunctional dentin adhesive "Prisma Universal Bond 2" had a 93.6% "excellent margin" along the dentin-composite margin before stressing which decreased to 84.4% after stress. These scores were not significantly different.
Dicor MGC Cerec嵌体临床应用于53颗牙齿，在24颗拔除的牙齿上也进行了应用。两个主要组又被细分为以下四个测试亚组：1. 无衬层的单功能牙本质粘结剂。2. 无衬层的双功能牙本质粘结剂。3. 有衬层的单功能牙本质粘结剂。4. 有衬层的双功能牙本质粘结剂。临床放置的修复体咬合面的边缘适合性通过扫描电子显微镜在200倍放大倍数下从复制件进行评估。相比之下，对所有修复的釉质表面以及在拔除牙齿上放置的修复体的远中颈部牙本质边缘的边缘适合性进行了类似评估。这些边缘在热机械应力前后进行了检查。修复体在5 - 55 - 5摄氏度的300个循环下承受120,000次应力，通过浸泡在75%的乙醇中20小时进行化学降解，并在1.96 N负荷下用牙刷刷洗30分钟。体外修复体也进行了染料渗透测试。临床放置的修复体咬合面的釉质 - 复合材料界面处记录的“边缘优秀”百分比在83.6%至88.2%之间变化。体外标本在热机械和化学应力之前相应的分数至少为95%，之后为90%。双功能牙本质粘结剂“Prisma Universal Bond 2”在应力前沿牙本质 - 复合材料边缘的“边缘优秀”率为93.6%，应力后降至84.4%。这些分数没有显著差异。
