Dentin bond strengths as a function of solvent and glutaraldehyde content.
OBJECTIVE
To evaluate the effect of the inclusion of glutaraldehyde on the shear bond strength of new ethanol-based adhesives (Gluma Comfort Bond & Desensitizer, GCBD and Gluma Comfort Bond, GCB) versus acetone-based Gluma One Bond (GOB) and a conventional three-step adhesive as a control.


METHODS
Forty bovine incisors were mounted in acrylic, polished to 600-grit, and randomly assigned to four groups (n=10). Dentin was etched for 15 s using 35% phosphoric acid, rinsed, and lightly dried. After adhesive application and curing, Charisma composite was applied in a #5 gelatin capsule and light-cured. Specimens were loaded in shear using an Instron at 5 mm/min. Shear bond strengths were calculated by dividing failure load by bonded surface area. ANOVA showed a significant difference in means at P< 0.01, so Tukey's test was used for pairwise comparisons.


RESULTS
Mean SBS (+/- SD, MPa) were: GOB: 8 (4.4)ab; GCB: 10 (4.4)ab; GCBD: 14 (6)bc; SBMP: 17.7 (6.4)c. Superscript letters indicate Tukey's homogeneous subsets (P< 0.05).
Ritter
A V
AV
Department of Operative Dentistry, University of North Carolina at Chapel Hill, School of Dentistry, 27599-7450, USA. Andre_Ritter@dentistry.unc.edu
Bertoli
C
C
Swift
E J
EJ
D000096:Acetone; D000269:Adhesives / Q000737:chemistry; D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D003432:Cross-Linking Reagents / Q000737:chemistry*; D001840:Dental Bonding; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D000431:Ethanol; D005976:Glutaral / Q000737:chemistry*; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry*; D012997:Solvents; D018709:Statistics, Nonparametric; D013718:Tensile Strength
D000269:Adhesives; D003432:Cross-Linking Reagents; D017220:Dentin-Bonding Agents; C445021:Gluma Comfort Bond; C445022:Gluma Comfort Bond & Desensitizer; C408265:Gluma One Bond; D008689:Methacrylates; D019279:Resin Cements; D012997:Solvents; C111486:gluma desensitizer; D000096:Acetone; D000431:Ethanol; D005976:Glutaral