Bonded to tooth ceramic restorations: in vitro evaluation of the efficiency and failure mode of two modern adhesives.
Bonded to tooth ceramic restorations: in vitro evaluation of the efficiency and failure mode of two modern adhesives.
复制标题
粘合到牙齿陶瓷修复体：两种现代粘合剂的效率和失效模式的体外评估。
DOI：
--
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
J. Holz
中科院分区：
文献类型：
--
作者：
D. Dietschi;P. Magne;J. Holz
通过染料渗透试验和直接-间接扫描电镜观察，对粘结牙瓷覆盖物的牙本质封闭性和内部粘结界面进行了体外评价。新的粘接剂如Optibond或Scotchbond MP在牙本质粘接方面表现出比以前的粘接剂更好的性能。由于大的粘结空间（300微米），刚性设置限制修复体和牙齿之间的补偿现象，再次证明对粘结陶瓷覆盖层的牙本质密封产生负面影响。在目前的测试条件下，即使应用全蚀刻技术，新粘合剂的牙本质粘合仍然是完美的。Optibond和Scotchbond MP的失效模式显示出一些特定的特征。对于这两个品牌，粘合失效主要发生在混合层和覆盖树脂之间;如间接SEM观察所示，这些不是人为的。目前，粘合剂界面的粘结性似乎并不是最佳的;因此，降低骨水泥空间应力的需要仍然是牙本质粘结修复体的首要问题。
Dentinal seal and the internal adhesive interface of bonded tooth ceramic overlays were evaluated in vitro, using a dye infiltration test and direct-indirect SEM observations. The new adhesives such as Optibond or Scotchbond MP demonstrated better performances in dentin bonding than former adhesives. With the large cementing space (300 microns), a rigid set-up restraining compensatory phenomena between the restoration and the tooth proved again to negatively influence the dentinal seal of bonded ceramic overlays. In the present test conditions, dentin bonding of the new adhesives remains perfectible, even if the total etch technique is applied. Failure modes of Optibond and Scotchbond MP showed some specific features. For both brands, bonding failures occurred mainly between the hybrid layer and the overlaying resins; these are not of an artefactual nature, as was demonstrated by indirect SEM observations. The cohesiveness of the adhesive interface does not appear optimal at the present time; the need for stress reduction in the cementing space therefore remains of primary concern in dentin bonded restorations.