Panichuttra R, Jones R M, Goodacre C, Munoz C A, Moore B K
Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok.
Int J Prosthodont. 1991 May-Jun;4(3):240-8.
Three hydrophilic poly(vinyl siloxane) impression materials, containing an intrinsic surfactant, were compared with a hydrophobic poly(vinyl siloxane) and a polyether impression material. The hydrophobic poly(vinyl siloxane) material was dimensionally more accurate than the hydrophilic poly(vinyl siloxane) in two of three measured dimensions, but the difference was small. The polyether material was the most wettable, and the hydrophilic poly(vinyl siloxane) were more wettable than the hydrophobic poly(vinyl siloxane). However, when a topical surfactant was used, no difference in wettability was noted between the hydrophilic and hydrophobic poly(vinyl siloxane), and their wettability was comparable to the polyether material, indicating that the topical surfactant was more effective than the intrinsic surfactants. Stone dies made from the hydrophobic poly(vinyl siloxane) material were harder than those obtained from the other materials.
三种含有内源性表面活性剂的亲水性聚（乙烯基硅氧烷）印模材料与一种疏水性聚（乙烯基硅氧烷）和一种聚醚印模材料进行了比较。在三个测量维度中的两个维度上，疏水性聚（乙烯基硅氧烷）材料在尺寸上比亲水性聚（乙烯基硅氧烷）更精确，但差异很小。聚醚材料的润湿性最强，亲水性聚（乙烯基硅氧烷）的润湿性比疏水性聚（乙烯基硅氧烷）更强。然而，当使用局部表面活性剂时，亲水性和疏水性聚（乙烯基硅氧烷）之间的润湿性没有差异，并且它们的润湿性与聚醚材料相当，这表明局部表面活性剂比内源性表面活性剂更有效。由疏水性聚（乙烯基硅氧烷）材料制成的石膏模型比由其他材料制成的更硬。
