Krejci I, Lutz F
Department of Preventive Dentistry, Periodontology and Cariology, Zurich University, Switzerland.
J Dent. 1990 Oct;18(5):263-70. doi: 10.1016/0300-5712(90)90026-b.
The marginal micromorphology and seal of mixed Class V restorations (i.e. restorations with margins located 50 per cent in dentine and 50 per cent in enamel) using Scotchbond VLC or Scotchbond 2 bonded to dentine in conventional and saucer-shaped cavities were evaluated. The four operative systems tested included a two-step incremental filling technique using the light-curing composite Silux, two direct inlay techniques using Silar or Silux as a luting cement and an inlay technique utilizing a Ca(OH)2 liner. All restoration types showed poor marginal adaptation in dentine irrespective of cavity design and bonding agent used. The inlay technique, tested in seven different variations, did not optimize marginal adaptation. Cavity lining with the Ca(OH)2 base material adversely affected dentine bonding. In mixed Class V restorations, marginal adaptation at the dentinal cavosurface line angle continues to pose a problem.
对使用Scotchbond VLC或Scotchbond 2在传统和碟形窝洞中粘结牙本质的V类混合修复体（即边缘50%位于牙本质、50%位于釉质的修复体）的边缘微观形态和封闭性进行了评估。测试的四种操作体系包括：使用光固化复合树脂Silux的两步增量填充技术、使用Silar或Silux作为粘结水门汀的两种直接嵌体技术以及使用Ca(OH)₂衬层的嵌体技术。无论窝洞设计和所使用的粘结剂如何，所有修复类型在牙本质中的边缘适应性均较差。在七种不同变体中测试的嵌体技术并未优化边缘适应性。用Ca(OH)₂基础材料进行窝洞衬层对牙本质粘结有不利影响。在V类混合修复体中，牙本质洞壁与洞面线角处的边缘适应性仍然是一个问题。
