Defects in automixed addition silicone elastomers prepared by putty‐wash impression technique

摘要

SummaryVoids 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 im