Abstract—Background

: The detachment of impression materials from impression tray is considered as an important problem which is difficult to be detected clinically. Several attempts were used to handle this problem, as roughening the surface of the tray, perforating it, or by the use of adhesive solutions which are recommended to be used by manufacturers. Objectives: To determine the tensile bond strength of two elastomeric impression materials; polysulphide and polyether to cold-cure acrylic resin disks with or without tray adhesive application at different drying and surface treatment. Material and Methods: Eighty specimens prepared consisted of two disks with impression material sandwiched between, then divided into two groups; 40 specimens for each type of impression. The “PD” hold adhesive material was applied on the acrylic surfaces which were smooth and rough. The adhesive was allowed to dry for 2, 5, and 10 minutes before the application of impression materials. To determine tensile bond strength at the interface between the adhesive-acrylic, and the adhesive-impression materials, a universal Instron testing machine was used. Results: Polyether impression material showed higher tensile bond strength to cold-cure acrylic than polysulphide impression material, without adhesive application. However, after adhesive application, the bond strength to polyether decreased, while for polysulphide increased significantly. Roughening the acrylic surface significantly increased the bond strength for both impression materials with or without adhesive application. Also, increasing the drying time from 2 up to 10 minutes significantly increased the bond strength for both impression materials, and smooth and rough acrylic surfaces. Conclusions: Polyether impression showed higher bond strength to cold-cure acrylic than polysulphide impression, without adhesive application.

中文翻译：

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胶粘剂和表面粗糙度对某些弹性模压材料与冷固化丙烯酸酯之间拉伸粘合强度的影响

摘要—背景

：从印模托盘上剥离印模材料被认为是一个重要问题，在临床上很难检测到。为了使托盘表面变粗糙，打孔或使用制造商建议使用的粘合剂溶液，已进行了多次尝试来解决此问题。目的：确定两种弹性印模材料的拉伸粘合强度；聚硫化物和聚醚制得的冷固化丙烯酸树脂圆盘，在有不同干燥和表面处理的情况下，可以使用或不使用托盘粘合剂。材料与方法：制备的80个标本由两片圆盘组成，中间夹有压印材料，然后分成两组。每种印象的样品40个。将“ PD”保持粘合材料施加在光滑且粗糙的丙烯酸表面上。在施加压印材料之前，让粘合剂干燥2、5和10分钟。为了确定粘合剂-丙烯酸和粘合剂-压模材料之间的界面处的拉伸粘合强度，使用了通用的Instron测试机。结果：聚醚印模材料与聚硫化印模材料相比，对聚丙烯酸印模材料显示出更高的对冷固化丙烯酸的拉伸粘合强度。然而，在施加粘合剂之后，与聚醚的粘合强度降低，而对于聚硫化物则显着提高。粗糙化丙烯酸表面会显着提高两种印模材料在有或没有粘合剂的情况下的粘合强度。同样，将干燥时间从2分钟延长至10分钟，会显着提高印模材料以及光滑和粗糙的丙烯酸表面的粘合强度。结论：在不使用粘合剂的情况下，聚醚印模显示出比聚硫化物印模更高的对冷固化丙烯酸的粘合强度。