The Journal of the American Dental Association
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J Am Dent Assoc, Vol 129, No 7, 1014-1021.
© 1998 American Dental Association
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CLINICAL PRACTICE

THE EFFECTS OF DIFFERENT STORAGE CONDITIONS ON POLYETHER AND POLYVINYLSILOXANE IMPRESSIONS



JOHN H. PURK, D.D.S., M.S., MICHAEL G. WILLES, D.D.S., DANIEL E. TIRA, PH.D., J. DAVID EICK, PH.D. and SHIRLEY H. HUNG, D.D.S., M.S.

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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Copyright©1995-1998 American Dental Association (ADA).
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