Wang R R, Nguyen T, Boyle A M
Department of Restorative Dentistry, School of Dentistry, Case Western Reserve University, Cleveland, Ohio, USA.
J Prosthet Dent. 1995 Nov;74(5):449-54. doi: 10.1016/s0022-3913(05)80344-0.
This study compared the adhesive shear bond strength of three selected impression materials with that of thermoplastic and acrylic resin tray materials as a function of surface preparation. Polyether (Impregum), polyvinylsiloxane (Reprosil), and polysulfide (Permlastic) impression materials were evaluated on smooth, rough, and contaminated tray surfaces. Smooth surface samples were formed against glass and served as the control groups. Experimental groups consisted of samples contaminated with artificial saliva and rough surface samples that were abraded with 110 microns of Al203. A total of 126 samples were subdivided into 18 groups of seven specimens each. Each sample consisted of a 1 inch square, 3 mm thick mass of an impression material sandwiched between the prepared surfaces of a pair of resin plates. Each specimen was tested in a universal testing machine for adhesive shear bond strength. Data were analyzed with three-way analysis of variance and Scheffe's test. The results indicated that the thermoplastic resin material had better adhesive properties than the acrylic resin. For both tray materials mean adhesive shear bond strengths for Impregum and Reprosil were significantly greater than those of Permlastic. Tray surface contaminated with saliva decreased the adhesive shear strength at the tray adhesive impression interface.
本研究比较了三种选定印模材料与热塑性树脂和丙烯酸树脂托盘材料的粘结抗剪强度，该强度是表面处理方式的函数。对聚醚（Impregum）、聚乙烯基硅氧烷（Reprosil）和聚硫橡胶（Permlastic）印模材料在光滑、粗糙和被污染的托盘表面进行了评估。在玻璃上制作的光滑表面样本用作对照组。实验组包括被人工唾液污染的样本以及用110微米的Al2O3磨损的粗糙表面样本。总共126个样本被细分为18组，每组7个样本。每个样本由一块夹在一对树脂板制备表面之间的1英寸见方、3毫米厚的印模材料组成。每个样本在万能试验机上测试粘结抗剪强度。数据采用三因素方差分析和谢费检验进行分析。结果表明，热塑性树脂材料比丙烯酸树脂具有更好的粘结性能。对于两种托盘材料，Impregum和Reprosil的平均粘结抗剪强度显著高于Permlastic。被唾液污染的托盘表面降低了托盘与印模之间界面处的粘结抗剪强度。
