IADR Abstract Archives
Shear Bond Strength To Silver Diamine Fluoride Treated Dentin
Objectives: To measure and compare the shear bond strength of composite resin to carious dentin before and after treatment with a 38% silver diamine fluoride and potassium iodide (SDF+KI).
Methods: The enamel of freshly extracted carious human teeth was removed from all teeth using a model grinder to expose the carious lesion. Soft caries was carefully removed until resistance was felt using a spoon excavator. Gr1 (control) received a coat of Scotchbond Universal (SBU) without prior etchant. Gr2-4 had a coat of SDF (Riva Star) applied followed by scrubbing a KI solution. SBU was then applied directly to Gr2 and applied to Gr3 following 15sec phosphoric acid etching. Gr4 was stored in PBS for 2 weeks and then received a coat of SBU without etchant. A 1.5mm diameter tube containing Filtek Supreme Ultra was applied over hard but carious dentin, and light-cured with a LED curing light (Deep Cure, irradiance>1000mW/cm2). All specimens were then stored in PBS/980F in an incubator then placed into a fixture attached to the Instron Universal Testing machine. A shear load was applied (1mm/min) until failure. Shear bond strength was calculated. Data analyzed with analysis of variance (ANOVA) (alpha=0.05).
Results: No statistical difference was found between groups (p>0.05) (mean+/-SD): Gr1 (12.9+/-7.4MPa), Gr2 (16.5+/-10.3MPa), Gr3 (12.4+/-4.9MPa), Gr4 (14.6+/-7.2MPa).
Conclusions: Within the limitations of this study it can be concluded that applications of Riva Star (SDF+KI) does not affect bond strength of a Universal Adhesive (SBU) in either a self-etch or total-etch mode. Delayed application of the adhesive after SDF+KI does not affect the bond of the SDF to carious dentin. This study was funded in part by SDI.
Methods: The enamel of freshly extracted carious human teeth was removed from all teeth using a model grinder to expose the carious lesion. Soft caries was carefully removed until resistance was felt using a spoon excavator. Gr1 (control) received a coat of Scotchbond Universal (SBU) without prior etchant. Gr2-4 had a coat of SDF (Riva Star) applied followed by scrubbing a KI solution. SBU was then applied directly to Gr2 and applied to Gr3 following 15sec phosphoric acid etching. Gr4 was stored in PBS for 2 weeks and then received a coat of SBU without etchant. A 1.5mm diameter tube containing Filtek Supreme Ultra was applied over hard but carious dentin, and light-cured with a LED curing light (Deep Cure, irradiance>1000mW/cm2). All specimens were then stored in PBS/980F in an incubator then placed into a fixture attached to the Instron Universal Testing machine. A shear load was applied (1mm/min) until failure. Shear bond strength was calculated. Data analyzed with analysis of variance (ANOVA) (alpha=0.05).
Results: No statistical difference was found between groups (p>0.05) (mean+/-SD): Gr1 (12.9+/-7.4MPa), Gr2 (16.5+/-10.3MPa), Gr3 (12.4+/-4.9MPa), Gr4 (14.6+/-7.2MPa).
Conclusions: Within the limitations of this study it can be concluded that applications of Riva Star (SDF+KI) does not affect bond strength of a Universal Adhesive (SBU) in either a self-etch or total-etch mode. Delayed application of the adhesive after SDF+KI does not affect the bond of the SDF to carious dentin. This study was funded in part by SDI.
