IADR Abstract Archives
Effect of SDF and KI on Bonding to Caries-affected Dentin
Objectives: Silver diamine fluoride (SDF) has anti-cariogenic properties that may help in arresting caries when applied as a pretreatment on caries-affected dentin underneath restorations. Application of a saturated potassium iodide (KI) solution following SDF has shown potential in decreasing dark staining of the tooth by SDF. We previously showed that SDF had a negative effect on bonding to sound dentin. This study aimed to evaluate the micro-tensile bond strength (MTBS) of resin composite to caries-affected dentin treated with either SDF or SDF-KI.
Methods: Occlusal enamel of 30 caries-free extracted human molars was removed to expose flat dentin surface. The specimens were immersed in demineralizing solution (pH 4.5) for 7d. A standard smear layer was created using 600-grit silicon carbide paper on the artificial caries-affected dentin, and the specimens were distributed into three groups (n=10). Control: Dentin rinsed with deionized (DI) water. SDF: Dentin treated with 38% SDF (Advantage Arrest) and rinsed off. SDF-KI: Dentin treated with SDF, then KI and finally rinsed off. Composite was bonded using Scotchbond Universal (3M ESPE) in total etch mode over dentin. MTBS beams were cut from each specimen using a diamond saw after 24h and tested. Data were analyzed by one-way ANOVA with Tukey HSD post-hoc.
Results: MTBS test results are presented in Table. The highest values were obtained in the Control and the lowest in SDF-KI, where pre-test failures were frequently observed. One-way ANOVA showed a significant difference among groups (p<0.005); post-hoc analysis suggested that while there was no statistical difference between Control and SDF, both groups were significantly different from SDF-KI.
Conclusions: Application of SDF followed by rinsing and phosphoric acid etching did not significantly change MTBS values when caries-affected dentin was the substrate. However, SDF-KI had a dramatic weakening effect on MTBS, compromising bonding to caries-affected dentin.
Methods: Occlusal enamel of 30 caries-free extracted human molars was removed to expose flat dentin surface. The specimens were immersed in demineralizing solution (pH 4.5) for 7d. A standard smear layer was created using 600-grit silicon carbide paper on the artificial caries-affected dentin, and the specimens were distributed into three groups (n=10). Control: Dentin rinsed with deionized (DI) water. SDF: Dentin treated with 38% SDF (Advantage Arrest) and rinsed off. SDF-KI: Dentin treated with SDF, then KI and finally rinsed off. Composite was bonded using Scotchbond Universal (3M ESPE) in total etch mode over dentin. MTBS beams were cut from each specimen using a diamond saw after 24h and tested. Data were analyzed by one-way ANOVA with Tukey HSD post-hoc.
Results: MTBS test results are presented in Table. The highest values were obtained in the Control and the lowest in SDF-KI, where pre-test failures were frequently observed. One-way ANOVA showed a significant difference among groups (p<0.005); post-hoc analysis suggested that while there was no statistical difference between Control and SDF, both groups were significantly different from SDF-KI.
Conclusions: Application of SDF followed by rinsing and phosphoric acid etching did not significantly change MTBS values when caries-affected dentin was the substrate. However, SDF-KI had a dramatic weakening effect on MTBS, compromising bonding to caries-affected dentin.