Ohsawa M, Jörgensen K D
Scand J Dent Res. 1983 Feb;91(1):51-4. doi: 10.1111/j.1600-0722.1983.tb00775.x.
The curing contraction of addition-type silicone impression materials was measured by the mercury bath method. The results point to a classification of this group of materials into the following two types: 1: materials with maximum 0.08% polymerization contraction at 22 degrees C 15 min after mixing and maximum 0.03% contraction at 22 degrees C during storage from 15 min to 24 h (Permagum, President, Reflect and Reprosil). 2: materials with more than 0.08% polymerization contraction at 22 degrees C 15 min after mixing and significantly more than 0.03% contraction during storage at 22 degrees C from 15 min to 24 h (Exaflex, Xantogum).
采用汞浴法测量加成型硅橡胶印模材料的固化收缩率。结果表明，该组材料可分为以下两种类型：1：混合后15分钟在22℃下聚合收缩率最大为0.08%，在22℃下储存15分钟至24小时期间收缩率最大为0.03%的材料（Permagum、President、Reflect和Reprosil）。2：混合后15分钟在22℃下聚合收缩率超过0.08%，在22℃下储存15分钟至24小时期间收缩率显著超过0.03%的材料（Exaflex、Xantogum）。
