Monticelli F, Osorio R, Mazzitelli C, Ferrari M, Toledano M
Department of Dental Materials, School of Dentistry, University of Granada, Spain.
J Dent Res. 2008 Oct;87(10):974-9. doi: 10.1177/154405910808701012.
Resin cement diffusion into dentin may differ as a function of the pre-treatment regimen. Since self-adhesive cements do not require substrate pre-treatment for luting, penetration of and interaction with the underlying dentin are questioned. We hypothesized that differences in the resin cement diffusion into dentin may exist among current commercial adhesive cements. Composite cylinders were luted on mid-coronal dentinal surfaces by an etch-and-rinse cement (Calibra), a self-etching system (Panavia F 2.0), and 4 self-adhesive cements (Multilink Sprint, Rely X Unicem, G-Cem, Bis-Cem). Dentin/cement interfacial characteristics were analyzed by a staining technique (Masson's trichrome) and by scanning electron microscopy. Conventional acid etching resulted in partially infiltrated adhesive interfaces differing from those achieved with the application of self-etching primer. No hybrid layer and/or resin tag formation was detectable at the interfaces bonded with self-adhesive cements. Limited decalcification/infiltration was observed for self-adhesive cements into the underlying dentin. Self-adhesive cements were not able to demineralize/dissolve the smear layer completely.
树脂水门汀向牙本质中的扩散可能因预处理方案而异。由于自粘结水门汀在粘结时不需要对基底进行预处理，因此其向下方牙本质的渗透及相互作用受到质疑。我们推测，目前市售的粘结性水门汀在树脂水门汀向牙本质中的扩散方面可能存在差异。用酸蚀冲洗型水门汀（Calibra）、自酸蚀系统（Panavia F 2.0）以及4种自粘结水门汀（Multilink Sprint、Rely X Unicem、G-Cem、Bis-Cem）将复合树脂圆柱体粘结于牙冠中部牙本质表面。通过染色技术（马松三色染色法）和扫描电子显微镜分析牙本质/水门汀界面特征。传统的酸蚀导致部分渗透的粘结界面与应用自酸蚀底漆所形成的界面不同。在与自粘结水门汀粘结的界面处未检测到混合层和/或树脂突形成。观察到自粘结水门汀向下方牙本质的脱钙/渗透有限。自粘结水门汀无法完全使玷污层脱矿/溶解。
