Dahl B L, Dymbe B, Valderhaug J
J Prosthet Dent. 1985 Jun;53(6):796-800. doi: 10.1016/0022-3913(85)90159-3.
Four hydrocolloid impression systems for fixed prosthodontics and one conventional alginate were tested for bonding properties between the syringe and the tray materials of the systems. Their dimensional stability was tested also after the impressions were kept in a humidor for 1, 3, and 24 hours before casts were poured. Findings showed that there was a true bond between the syringe and the tray materials for all combinations. The precision tests gave a mean percent difference between the master model and the cast of less than 0.15 for all material combinations at both the 1- and 3-hours observations. The same was true at the 24-hours observation, except for one combination. From a clinical point of view, all the materials can be used for fixed prosthodontic impressions even if kept for 1 and 3 hours in 100% humidity before pouring the casts; however one material was unsuitable if kept for 24 hours before pouring.
对四种用于固定修复的水胶体印模材料系统和一种传统藻酸盐材料进行了测试，以考察这些系统中注射器材料与托盘材料之间的粘结性能。在灌注模型之前，将印模在保湿器中保存1、3和24小时后，还测试了它们的尺寸稳定性。结果表明，所有组合的注射器材料与托盘材料之间都存在真正的粘结。精度测试显示，在1小时和3小时观察时，所有材料组合的主模型与铸型之间的平均百分比差异均小于0.15。在24小时观察时，除一种组合外，情况也是如此。从临床角度来看，即使在灌注模型前在100%湿度下保存1小时和3小时，所有材料都可用于固定修复印模；然而，如果在灌注前保存24小时，有一种材料是不合适的。
