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Some parameters for testing deformation of elastomeric impression materials
Author(s) -
Blomberg P. A. H.,
Mahmood S.,
Smales R. J.,
Makinson O. F.
Publication year - 1992
Publication title -
australian dental journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.701
H-Index - 71
eISSN - 1834-7819
pISSN - 0045-0421
DOI - 10.1111/j.1834-7819.1992.tb04743.x
Subject(s) - impression , elastomer , deformation (meteorology) , materials science , composite material , forensic engineering , computer science , engineering , world wide web
Because of conflicting published data, the temperature rise in four elastomeric materials was measured with a thermistor during setting in the oral cavity and in metal and plastic moulds of varying shapes and volumes for ‘elastic set’ specimens. The clinical temperature rise was 2–3°C higher in the molar region than anteriorly, except for the polysiloxane. The temperature range attained in the set materials varied from 29°C to nearly 35°C for clinical and in vitro specimens. The average time taken by a group of operators to remove this type of impression from the mouth was five seconds. In a custom tray with light and heavy viscosity materials, the syringe material layer was only 0–0.15 mm thick and, essentially, the heavy viscosity material provided the elastic components for the impression.