Itou K, Torii Y, Takimura T, Chikami K, Ishikawa K, Suzuki K
Department of Operative Dentistry, Okayama University Dental School, 2-5-1 Shikata, Okayama 700-8525, Japan.
Int J Prosthodont. 2001 May-Jun;14(3):225-30.
The purpose of this study was to investigate the effect of priming time on bovine enamel and dentin adhesion promoted by self-etching primer systems.
Two commercial self-etching primer systems, Clearfil SE Bond (SE) and Unifil Bond (UB), were used. Bovine enamel and dentin were treated with each system with various priming times (5, 20, and 60 seconds), and the tensile bond strength was measured. Scanning electron microscopic (SEM) observation was also performed to examine the effect of priming time on the morphology of the resin-tooth interface.
The tensile bond strength to enamel ranged from 10.6 to 14.3 MPa, and no statistically significant difference was detected among products or priming times. To dentin, UB showed the statistically significantly lowest tensile bond strength when primed for 5 seconds, 6.9 +/- 1.1 MPa, but there was no significant difference between the groups primed for 20 and 60 seconds, 13.5 +/- 4.1 MPa and 13.8 +/- 4.6 MPa, respectively. SE created tensile bond strengths ranging from 13.9 to 15.7 MPa and showed no effect of priming time on dentin adhesion. SEM observation revealed that resin penetrated into both enamel and dentin more deeply with extension of priming time.
Priming times longer than those recommended by the manufacturers did not influence the tensile bond strength to enamel and dentin when using two commercial self-etching primers. In contrast, a shortened priming time, 5 seconds, carried a risk of decreasing dentin adhesion, although it had no adverse effect on enamel adhesion.
本研究旨在探讨预处理时间对自酸蚀底漆系统促进牛牙釉质和牙本质黏附的影响。
使用两种市售自酸蚀底漆系统，即Clearfil SE Bond（SE）和Unifil Bond（UB）。用各系统在不同预处理时间（5、20和60秒）处理牛牙釉质和牙本质，测量拉伸黏结强度。还进行了扫描电子显微镜（SEM）观察，以研究预处理时间对树脂-牙界面形态的影响。
牙釉质的拉伸黏结强度在10.6至14.3MPa之间，产品或预处理时间之间未检测到统计学上的显著差异。对于牙本质，UB在预处理5秒时显示出统计学上显著最低的拉伸黏结强度，为6.9±1.1MPa，但预处理20秒和60秒的组之间无显著差异，分别为13.5±4.1MPa和13.8±4.6MPa。SE产生的拉伸黏结强度在13.9至15.7MPa之间，且预处理时间对牙本质黏附无影响。SEM观察显示，随着预处理时间延长，树脂向牙釉质和牙本质内的渗透更深。
使用两种市售自酸蚀底漆时，比制造商推荐的预处理时间更长，不会影响对牙釉质和牙本质的拉伸黏结强度。相比之下，缩短的预处理时间（5秒）有降低牙本质黏附的风险，尽管对牙釉质黏附没有不利影响。
