Soh G, Chong Y H
Department of Preventive Dentistry, National University of Singapore, Kent Ridge.
J Oral Rehabil. 1991 Nov;18(6):547-53. doi: 10.1111/j.1365-2842.1991.tb00077.x.
Voids presenting in impressions of five automixed addition silicone elastomers were investigated. Impressions were prepared with the putty-light body impression technique on stainless-steel cylinders with acrylic spacers. The number of voids was counted at a predetermined site on three separate days using a stereomicroscope at x7 magnification. Impression specimens of a hand-mixed addition silicone, and from hand-mixing of the automixed materials, were made for comparison. Express gave a significantly higher number of voids than other automixed materials, with President Jet having the lowest void count. Automixed materials generally produced impressions with significantly fewer voids than the hand-mixed material. Automixing was effective in reducing void defects in elastomeric impressions.
对五种自动混合加成型硅橡胶印模材料中出现的气泡进行了研究。采用油泥-轻体印模技术，在带有丙烯酸间隔物的不锈钢圆柱体上制备印模。使用放大倍数为x7的体视显微镜，在三个不同的日期对预定部位的气泡数量进行计数。制备了手工混合加成型硅橡胶的印模样本，以及自动混合材料的手工混合印模样本用于比较。Express产生的气泡数量明显高于其他自动混合材料，而President Jet的气泡数量最少。自动混合材料通常产生的印模气泡数量明显少于手工混合材料。自动混合有效地减少了弹性体印模中的气泡缺陷。
