Koike Toshie, Hasegawa Tokuji, Itoh Kazuo, Yukitani Wataru, Yamashita Takashi, Wakumoto Sadao, Hisamitsu Hisashi
Operative Dentistry, Showa University School of Dentistry, Tokyo, Japan.
Am J Dent. 2002 Jun;15(3):159-63.
To test the efficacy of the multiple application of a total-etch dentin adhesive was investigated by measuring (1) the contraction gap width of a light-activated resin-based composite in a cylindrical dentin cavity and (2) the early tensile bond strength to a flat dentin surface with the Single Bond Dental Adhesive System.
Contraction gap width was measured in a cylindrical dentin cavity (3 mm x 1.5 mm) treated with a single coat or double coats of the Single Bond adhesive and restored with Silux Plus or Z-100. As control, the cavity was treated with an experimental dentin bonding system consisting of EDTA, 35% GM and Clearfil Photo Bond. Early tensile bond strengths of Silux Plus or Z-100 were measured on the flat dentin surface treated with the three bonding procedures as in the contraction gap study within 10 min. after final cure.
The contraction gap of Silux Plus and Z-100 was prevented with the double coats of the Single Bond adhesive, whereas the contraction gap of Z-100 was not prevented with the single coat of the Single Bond and the experimental system. When the film thickness of the Single Bond system was less than 2 microm, the gap could not be prevented. The tensile bond strengths of Silux Plus and Z-100 to flat dentin mediated with the three bonding procedures were not significantly different (P>0.05).
通过测量（1）圆柱形牙本质窝洞中光固化树脂基复合材料的收缩间隙宽度，以及（2）使用单键牙科粘结系统对平坦牙本质表面的早期拉伸粘结强度，来研究全蚀刻牙本质粘结剂多次应用的效果。
在经单键粘结剂单涂层或双涂层处理并用Silux Plus或Z - 100修复的圆柱形牙本质窝洞（3毫米×1.5毫米）中测量收缩间隙宽度。作为对照，窝洞用由乙二胺四乙酸（EDTA）、35%的GM和Clearfil Photo Bond组成的实验性牙本质粘结系统处理。在最终固化后10分钟内，按照收缩间隙研究中的三种粘结程序处理平坦牙本质表面，测量Silux Plus或Z - 100的早期拉伸粘结强度。
单键粘结剂双涂层可防止Silux Plus和Z - 100的收缩间隙，而单键粘结剂单涂层和实验系统不能防止Z - 100的收缩间隙。当单键系统的膜厚度小于2微米时，间隙无法防止。三种粘结程序介导的Silux Plus和Z - 100与平坦牙本质的拉伸粘结强度无显著差异（P>0.05）。
