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Microleakage in alloy‐glass ionomer lined amalgam restorations after thermocycling
Author(s) -
ARCORIA C.J.,
FISHER M.A.,
WAGNER M.J.
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.tb00025.x
Subject(s) - varnish , glass ionomer cement , materials science , amalgam (chemistry) , dentistry , alloy , molar , composite material , chemistry , medicine , coating , electrode
Summary Marginal microleakage was measured around amalgam restorations lined with alloyglass ionomer cement and coated with a glass ionomer varnish. Preparations were made in 48 human extracted mandibular molar teeth. Alloy‐glass ionomer liners and varnishes were placed into selected preparations. Tytin amalgam was inserted into all of the teeth and left unburnished and unpolished. Half of the total samples were thermocycled for 5 days and the remainder were left in deionized water. The teeth were immersed in a 0.5% methylene blue dye and sectioned vertically with a diamond saw. Microleakage was scored visually at xl00 magnification, and the data were analysed using the Mann‐Whitney U ‐test (P≤0.05). Thermocycling did not have a significant effect on microleakage, except when both an alloy‐glass ionomer liner and varnish were used. Overall, the use of an alloy‐glass ionomer liner made the most significant difference in reducing microleakage.