Murata Takuya, Maseki Toshio, Nara Yoichiro
Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University.
Dent Mater J. 2018 Nov 30;37(6):928-939. doi: 10.4012/dmj.2017-377. Epub 2018 Jul 12.
The effects of immediate dentin sealing (IDS) applications on the bonding of computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic onlay restorations after cyclic loading were examined. Standardized mesial-distal-occlusal-palatal cavities in 32 extracted human molars were prepared. The cavities were divided into four groups: those receiving thin-layered (T), slope-shaped (S), and base-shaped (B) sealing, and the non-sealing group (N) as a control. The intra-cavity dentin walls of the T, S, and B groups were sealed with an all-in-one adhesive and a flowable composite. All cavities were scanned; hence, CAD/CAM onlays were fabricated using ceramic blocks and bonded with a resin cement system. Cyclic loading was applied and the microtensile bond strength (μ-TBS) was measured. It was found that IDS application improved not only the μ-TBS, but also the bonding reliability and durability of the CAD/CAM restoration. In particular, the S restoration exhibited the highest-performance as regards both robust bond strength and stable bonding.
研究了即时牙本质封闭（IDS）应用对循环加载后计算机辅助设计/计算机辅助制造（CAD/CAM）陶瓷高嵌体修复体粘结的影响。在32颗拔除的人磨牙上制备标准化的近中-远中-咬合-腭侧洞形。这些洞形分为四组：接受薄层（T）、斜坡形（S）和基底形（B）封闭的组，以及作为对照的非封闭组（N）。T、S和B组的洞内牙本质壁用一体化粘结剂和可流动复合树脂封闭。对所有洞形进行扫描；因此，使用陶瓷块制作CAD/CAM高嵌体，并用树脂粘结剂系统粘结。施加循环加载并测量微拉伸粘结强度（μ-TBS）。结果发现，IDS应用不仅提高了μ-TBS，还提高了CAD/CAM修复体的粘结可靠性和耐久性。特别是，S修复体在牢固的粘结强度和稳定的粘结方面表现出最高的性能。
