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Published on: March 8, 2019
The effects of different storage conditions on polyether and polyvinylsiloxane impressions
J H Purk1, M G Willes, D E Tira
1Department of Operative Dentistry, University of Missouri-Kansas City School of Dentistry 64108, USA.
Abstract:
While being shipped to a laboratory, impressions can be exposed to excessive temperatures. This study compared the effects of different time and temperature storage conditions, including temperature extremes of 66 C and -10 C, on the accuracy of addition silicone and polyether impressions. The greatest distortion generally occurred as a result of the 66 C temperature extreme. The authors recommend that impressions be poured in stone according to manufacturers' specifications before being shipped to a dental laboratory.
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