Rios M P, Morgano S M, Stein R S, Rose L
Department of Restorative Sciences, Boston University Goldman School of Dental Medicine, Boston, Mass, USA.
J Prosthet Dent. 1996 Oct;76(4):356-62. doi: 10.1016/s0022-3913(96)90538-7.
Currently available impression materials were not designed for disinfection or sterilization, and it is conceivable that disinfectants may adversely affect impressions. This study evaluated the accuracy and dimensional stability of polyether (Permadyne/Impregum) and polyvinyl siloxane (Express) impression materials retained by their adhesives in two different acrylic resin tray designs (perforated and nonperforated) when the materials were immersed for either 30 or 60 minutes in three high-level disinfectants. Distilled water and no solution served as controls. A stainless steel test analog similar to ADA specification No. 19 was used. A total of 400 impressions were made with all combinations of impression materials, tray designs, disinfectant, and soaking times. Samples were evaluated microscopically before and after immersion and 48 hours after soaking. Results indicated that these two impression materials were dimensionally stable. Because the results emphasized the stability and accuracy of the impression complex under various conditions, dentists can perform disinfection procedures similar to the protocol of this study without concern for clinically significant distortion of the impression.
目前可用的印模材料并非为消毒或灭菌而设计，因此可以想象消毒剂可能会对印模产生不利影响。本研究评估了聚醚（Permadyne/Impregum）和聚乙烯基硅氧烷（Express）印模材料在两种不同丙烯酸树脂托盘设计（穿孔和非穿孔）中，通过其粘合剂固定，当材料在三种高水平消毒剂中浸泡30或60分钟时的准确性和尺寸稳定性。蒸馏水和无溶液作为对照。使用了类似于ADA规范第19号的不锈钢测试模型。总共制作了400个印模，涵盖印模材料、托盘设计、消毒剂和浸泡时间的所有组合。在浸泡前后以及浸泡48小时后对样本进行显微镜评估。结果表明这两种印模材料尺寸稳定。由于结果强调了印模复合体在各种条件下的稳定性和准确性，牙医可以按照本研究的方案进行消毒程序，而无需担心印模出现临床上显著的变形。
