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Minimizing Dentinal Fluid Flow Associated with Gap Formation
D.N. Ratih,
J.E.A. Palamara* and
H.H. Messer
Department of Restorative Dentistry, School of Dental Science, The University of Melbourne, 720 Swanston Street, Melbourne, Victoria 3010, Australia

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Figure 1. Outward fluid flow behavior for 15 min after light-curing of resin composite. Outward fluid flow of liner groups (conventional and light-cured GIC) stopped earlier than that of bonding groups (low-shrinkage and high-shrinkage resin groups), which exhibited continuing outward fluid flow for at least 15 min. Only the mean values (n = 8 teeth per group except for the conventional GIC group, n = 7) are shown for clarity. The standard deviation for each group was typically in the range 10–20% of the mean. LC-GIC = light-cured glass-ionomer cement; C-GIC = conventional glass-ionomer cement; LSC = low-shrinkage composite; HSC = high-shrinkage composite.
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Figure 2. Scanning electron micrograph of an epoxy replica of the high-shrinkage composite-dentin interface, showing a gap between dentin and resin composite approximately 5 µm in width. D = dentin; C = resin composite.
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Journal of Dental Research, Vol. 85, No. 11,
1027-1031 (2006)
DOI: 10.1177/154405910608501110

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