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Dental amalgams subjected to sub‐fracture stresses at 37°C
Author(s) -
GERZINA T.M.,
WING G.
Publication year - 1991
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1991.tb00040.x
Subject(s) - amalgam (chemistry) , fracture (geology) , materials science , creep , modulus , composite material , rheology , deformation (meteorology) , beam (structure) , dentistry , structural engineering , medicine , chemistry , electrode , engineering
Summary Amalgam beam specimens were subjected to sub‐modulus of rupture loads at 37°C. The specimens tested underwent varying degrees of deformation and ultimate fracture determined by the degree of specimen bend and time to fracture. The property most closely related to the sub‐fracture loading behaviour was creep, particularly the 72‐h determination of this property. Time and temperature of testing are also significant factors. The present study indicates the importance of the use of 37°C testing in low‐load stressing of dental amalgam. The study has confirmed the nature of failure of amalgam in relation to its rheological properties at the temperature at which amalgam functions clinically.