Dentin treatment with an oxalate solution and glass ionomer bond strength.
OBJECTIVE
To evaluate the effect of dentin surface treatment on shear bond strengths of two visible light-cured glass ionomer restorative materials to dentin.


METHODS
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.


RESULTS
In every instance, the oxalate solution significantly reduced the shear bond strength of both materials.
Haveman
C W
CW
Department of General Practice, University of Texas Health Science Center at San Antonio, Texas.
Charlton
D G
DG
D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D001840:Dental Bonding; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure; D003807:Dentin Sensitivity / Q000188:drug therapy*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010070:Oxalates / Q000737:chemistry* / Q000494:pharmacology / Q000627:therapeutic use; D012117:Resins, Synthetic / Q000737:chemistry; D013718:Tensile Strength
D000180:Acrylic Resins; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D010070:Oxalates; C090892:Protect Dentin Desensitizer; D012117:Resins, Synthetic; C081982:VariGlass VLC