Premium
Phenomenological model of creep of dental amalgam
Author(s) -
VRIJHOEF M. M. A.,
LOURENS F. L.,
LEIJDEKKERSGOVERS A. F. M.
Publication year - 1983
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.1365-2842.1983.tb00129.x
Subject(s) - creep , amalgam (chemistry) , alloy , materials science , ageing , phenomenological model , metallurgy , composite material , medicine , mathematics , chemistry , statistics , electrode
Summary Earlier work revealed that creep of a particular dental amalgam can be described by the model F ( t )= F 0 exp ( t / t 0 ) m . Here F ( t ) is the creep compliance at time t , whereas F 0 , t 0 and m are constants of the model. In the previous study only three alloys were used. It was the aim of this study to investigate the factor alloy more thoroughly. After specimen preparation, the nineteen different amalgams were aged at 37°C for either one day or one week. Then creep was determined at a temperature of 22.5°C and a compressive stress of 117 MN/m 2 . F0 turns out to depend upon both the ageing time as well as on the choice of the alloy. As expected, t 0 shows up substantial differences between the respective amalgams, whereas the differences between the two ageing are absent or relatively small. The factor alloy significantly influences m . However, the ageing time exerts no significant influence upon m .