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Base‐varnish interactions around amalgam restorations: Spectrophotometric and microscopic assessment of leakage *
Author(s) -
Silva Margarita,
Messer L. B.,
Douglas W.,
Weinberg R.
Publication year - 1985
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.1834-7819.1985.tb05349.x
Subject(s) - varnish , amalgam (chemistry) , materials science , dentistry , leakage (economics) , composite material , chemistry , medicine , electrode , economics , macroeconomics , coating
A bstract — The effects of bases and cavity varnishes on microleakage around amalgam restorations were investigated in vitro . Restored teeth were examined after storage for 48 hours, 1 and 3 months, temperature cycling and immersion in methylene blue. Leakage of specimens, assessed quantitatively by microscopy (linear measurement) and spectrophotometry (volumetric measurement), showed the following decreasing order: no varnish, varnish‐base, and varnish. Leakage around amalgam restorations can be minimized by the application of two layers of copal resin varnish limited to the walls and cavo‐surface margins.