TITLE

Dentinal shear bond strength, microleakage, and contraction gap of visible light-polymerized liners/bases

AUTHOR(S)
Cooley, Robert L.; Barkmeier, Wayne W.
PUB. DATE
June 1991
SOURCE
Quintessence International;Jun1991, Vol. 22 Issue 6, p467
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The bond strength and microleakage patterns of three light-curing glass-ionomer cement liners/bases (Vitrebond, XR Ionomer, and Zionomer) were evaluated and compared to a fluoride-releasing resin (TimeLine) designed for the same use. Bond strength tests were performed at 24 hours and 7 days. At 24 hours Vitrebond, TimeLine, and Zionomer had statistically significantly greater bond strengths than XR Ionomer. At 7 days, Vitrebond had a statistically significantly stronger bond than the others. Microleakage was evaluated after 24 hours of thermocycling. Vitrebond and XR Ionomer had statistically significantly less leakage than the others, while TimeLine had significantly more leakage than the others. Polymerization contraction gaps between the liners/bases and dentin were examined with scanning electron microscopy. Contraction gaps were approximately 10 μm with Vitrebond and XR Ionomer and 5 μm with TimeLine. A contraction gap generally was not observed with Zionomer.
ACCESSION #
38698877

 

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