A new approach in self-etching adhesive formulations: Replacing HEMA for surfactant dimethacrylate monomers

作者：Zanchi Cesar Henrique^*; Muenchow Eliseu Aldrighi; Ogliari Fabricio Aulo; de Carvalho Rodrigo Varella; Chersoni Stefano; Prati Carlo; Demarco Flavio Fernando; Piva Evandro

来源：Journal of Biomedical Materials Research Part B: Applied Biomaterials , 2011, 99B(1): 51-57.

DOI：10.1002/jbm.b.31871

• dental adhesives
• surface-active agents
• microtensile bond strength test
• resin-dentin interface
• hybrid layer

This study evaluated the influence of surfactant dimethacrylates (SD) on the resin-to-dentin microtensile bond strength (mu TBS) and characterized the interfacial micromorphology of the hybrid layer of the experimental HEMA-free self-etching systems. Five experimental HEMA-free two-step self-etching systems containing different SD (Bis-EMA 10, Bis-EMA 30, PEG 400, PEG 1000, and PEG 400 UDMA) and a HEMA-containing system (control) were compared. Each experimental adhesive system was applied and resin composite restorations were incrementally built up in bovine incisors. After 24 h, restored teeth were sectioned to obtain 24 sticks per group. Thereafter, the specimens were subjected to the mu TBS test. Data (MPa) were analyzed by One-way ANOVA and Tukey's test. Adhesive-dentin interfaces were analyzed through Scanning Electron Microscopy (SEM). The adhesive system formulated with PEG 400 UDMA produced mu TBS similar to the HEMA-containing group and statistically higher than the HEMA-free groups. Similar failure percentages were observed in the PEG 400 UDMA and the control group. In the SEM analysis, all the adhesive systems presented similar partially demineralized hybrid layer (1.5-3.0 mu m thickness) with well-formed resin tags. All SD presented reasonable initial mu TBS, with the PEG 400 UDMA being a promising monomer to be considered as a HEMA substitute in adhesive systems compositions.

• 出版日期2011-10