Removal Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Dent Mater J. 2010 May;29(3):336-40. doi: 10.4012/dmj.2009-096. Epub 2010 May 19.
The effect of new adhesives on the bond strength of elastomeric impression materials to acrylic trays was evaluated. Two polyvinyl siloxane impression materials (Fusion and Imprinsis) with reactive adhesives and one (Examix) with a conventional adhesive were tested. Flat, double-sided plates of auto-polymerizing methyl methacrylate (10 x 10 x 2.5 mm) were prepared with one of the adhesives. Five specimens were prepared by injecting each impression material into a 2-mm gap between the two plates. Tensile tests were conducted until separation failure occurred. The mean bond strengths of Fusion (1.0 MPa) and Imprinsis (0.8 MPa) were significantly greater than that of Examix (0.2 MPa). On the contrary, one of five Fusion showed adhesive failure mode while all the Imprinsis exhibited mixed failure. The conflicting results were presumably attributed to the mean tear strength of Fusion (0.8 N/mm) being higher than that of Imprinsis (0.5 N/mm).
研究了新型黏合剂对弹性印模材料与丙烯酸托盘黏结强度的影响。实验中使用了两种含有反应性黏合剂的聚硅氧烷印模材料（Fusion 和 Imprinsis）和一种含有传统黏合剂的印模材料（Examix）。用一种黏合剂制备了双面、平板、自聚合甲基丙烯酸甲酯（10×10×2.5mm）的双板。将每种印模材料注入两块板之间的 2mm 间隙中，制备了 5 个试件。进行拉伸试验，直到发生分离失效。Fusion（1.0MPa）和 Imprinsis（0.8MPa）的平均黏结强度明显大于 Examix（0.2MPa）。相反，在 5 个 Fusion 中，有 1 个表现出黏附性失效模式，而所有的 Imprinsis 均表现为混合性失效。这种矛盾的结果可能归因于 Fusion 的平均撕裂强度（0.8N/mm）高于 Imprinsis（0.5N/mm）。
