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Creep versus marginal fracture of amalgam restorations
Author(s) -
VRIJHOEF M. M. A.,
LETZEL H.
Publication year - 1986
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.1365-2842.1986.tb00663.x
Subject(s) - amalgam (chemistry) , fracture (geology) , dentistry , creep , orthodontics , materials science , medicine , composite material , chemistry , electrode
Summary In the literature there is controversy over the existence of a correlation between creep and marginal deterioration of amalgam restorations. It was the aim of this study to re‐investigate this correlation. In five clinical trials, 2068 amalgam restorations were made of six conventional alloys and ten high copper systems. The results show a correlation between creep and marginal fracture in the conventional, low copper amalgams. No correlation could be found for the group of high copper, non‐gamma‐2, amalgams. It is emphasized that dental practitioners should not buy their amalgam alloy on the basis of creep data, because wrong decisions might be taken. Evidence from a controlled clinical study is a more reliable criterion.