Dentin treatment with an oxalate solution and glass ionomer bond strength
Haveman, C.W.; Charlton, D.G.
American Journal of Dentistry 7(5): 247-251
1994
ISSN/ISBN: 0894-8275 PMID: 7986446 Document Number: 426056
To evaluate the effect of dentin surface treatment on shear bond strengths of two visible light-cured glass ionomer restorative materials to dentin. Cylinders of Fuji II LC and VariGlass VLC were bonded to dentin surfaces that were (1) treated as directed by the manufacturer, (2) treated with a monohydrogen-monopotassium oxalate solution (Protect Dentin Desensitizer), or (3) treated with the monohydrogen-monopotassium oxalate solution followed by treatment per the manufacturer. Specimens were thermocycled and tested in shear at 7 days. Data for each restorative material were subjected to a one-way ANOVA and the Scheffé F-test (P < 0.05). After shear bond testing the specimens were examined using a stereomicroscope at x8 to determine the mode of failure (adhesive, cohesive or mixed). Dentin specimens were also surface treated as described above, sputter-coated, and examined using a scanning electron microscope. In every instance, the oxalate solution significantly reduced the shear bond strength of both materials.