Ikeda Takatsumi, De Munck Jan, Shirai Kenichi, Hikita Kazuhiro, Inoue Satoshi, Sano Hidehiko, Lambrechts Paul, Van Meerbeek Bart
Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Kapucijnenvoer 7, B-3000 Leuven, Belgium.
Dent Mater. 2005 May;21(5):413-20. doi: 10.1016/j.dental.2004.07.006.
The purpose of this study was to measure the micro-tensile bond strength (microTBS) of two adhesives to dentin and to correlate this microTBS with the micro-tensile fracture strength (microTFS) of primer-adhesive mixtures of the two adhesives.
The three-step etch&rinse adhesive OptiBond FL (Kerr) and the two-step self-etch adhesive Clearfil SE Bond (Kuraray) were used to bond Filtek Z100 (3M ESPE) to twenty mid-coronal dentin surfaces. The microTBS was determined at 1 and 24 h after light-curing. In addition, the microTFS of primer-adhesive mixtures (primer:adhesive=1:3 by weight) and of the pure adhesives (controls) were measured after the same time intervals.
The microTBS to dentin of OptiBond FL at 24 h was significantly higher than at 1 h and than the microTBS of Clearfil SE Bond at 24 h. The mean microTFS of the primer-adhesive mixtures was always lower than the microTFS of the respective adhesives. The highest reduction in microTFS due to mixing primer with the adhesive resin was measured for Clearfil SE Bond. Both the microTFS of the primer-adhesive mixtures and the pure adhesives of OptiBond FL and Clearfil SE Bond increased with time.
The early 1 h microTBS to dentin was lower than the 24 h microTBS for OptiBond FL, but not for Clearfil SE Bond. Differences in polymerization efficiency as well as in the resulting interfacial strength may explain such varying early bond strengths to dentin.
本研究旨在测量两种粘接剂与牙本质之间的微拉伸粘接强度（microTBS），并将此微拉伸粘接强度与两种粘接剂的底涂剂 - 粘接剂混合物的微拉伸断裂强度（microTFS）相关联。
使用三步酸蚀冲洗粘接剂OptiBond FL（ Kerr公司）和两步自酸蚀粘接剂Clearfil SE Bond（可乐丽公司）将Filtek Z100（3M ESPE公司）粘接至二十个牙冠中部牙本质表面。在光固化后1小时和24小时测定微拉伸粘接强度。此外，在相同时间间隔后测量底涂剂 - 粘接剂混合物（底涂剂：粘接剂 = 重量比1:3）和纯粘接剂（对照）的微拉伸断裂强度。
OptiBond FL在24小时时与牙本质的微拉伸粘接强度显著高于1小时时，且高于Clearfil SE Bond在24小时时的微拉伸粘接强度。底涂剂 - 粘接剂混合物的平均微拉伸断裂强度始终低于各自粘接剂的微拉伸断裂强度。Clearfil SE Bond的底涂剂与粘接剂树脂混合后微拉伸断裂强度降低最多。OptiBond FL和Clearfil SE Bond的底涂剂 - 粘接剂混合物以及纯粘接剂的微拉伸断裂强度均随时间增加。
OptiBond FL在1小时时与牙本质的早期微拉伸粘接强度低于24小时时，但Clearfil SE Bond并非如此。聚合效率以及由此产生的界面强度的差异可能解释了与牙本质早期粘接强度的这种变化。
