IADR Abstract Archives
Effect of VPT Antiseptic Agents on Dentin Bonding After Aging
Objectives: To evaluate the effect of antiseptic agents used for hemostasia control and pulp lavage in vital pulp therapy (VPT) on microtensile bond strength (µTBS) to dentin after 6-month aging, using a universal adhesive, with self-etch (SE) and etch-and-rinse (ER) strategies.
Methods: Exposed dentin surfaces of 40 human molars were randomly divided into 8 groups (n=5) according to the (I) antiseptic agent (untreated [Control], 2.5% NaOCl for 5 minutes [NaOCl_5], 2.5% NaOCl for 10 minutes [NaOCl_10] or 2% chlorhexidine for 5 minutes [CHX_5]) and (II) adhesive strategy ([SE] or [ER]). After universal adhesive application (Scotchbond Universal Plus) crowns were restored with composite (Ceram.x Spectra ST). Specimens were sectioned into beams and half of them were subjected to µTBS test after 24 water storage and the rest after 6 months. Failure mode was determined (FM) and data were analyzed by three-way ANOVA and Student's t test (p<0.05), without considering pre-test failures (PF).
Results: Table shows µTBS mean values in MPa (sd). No relevant effect of the antiseptic solutions on µTBS was detected as values were only influenced by the adhesive strategy (p<0.001), aging (p<0.001) and interaction between them (p<0.013). After 24 hours, higher bond strength values were determined when the adhesive was applied with an ER strategy, although after 6-month aging a significant reduction was detected.
Conclusions: The antiseptic solutions evaluated for pulpal hemostasia seem not to affect µTBS. ER adhesive strategy yielded higher bond strength values immediately in comparison with SE strategy. However, both strategies showed similar values after aging. ER application mode was associated to a significant reduction on µTBS after 6-month water aging.
Methods: Exposed dentin surfaces of 40 human molars were randomly divided into 8 groups (n=5) according to the (I) antiseptic agent (untreated [Control], 2.5% NaOCl for 5 minutes [NaOCl_5], 2.5% NaOCl for 10 minutes [NaOCl_10] or 2% chlorhexidine for 5 minutes [CHX_5]) and (II) adhesive strategy ([SE] or [ER]). After universal adhesive application (Scotchbond Universal Plus) crowns were restored with composite (Ceram.x Spectra ST). Specimens were sectioned into beams and half of them were subjected to µTBS test after 24 water storage and the rest after 6 months. Failure mode was determined (FM) and data were analyzed by three-way ANOVA and Student's t test (p<0.05), without considering pre-test failures (PF).
Results: Table shows µTBS mean values in MPa (sd). No relevant effect of the antiseptic solutions on µTBS was detected as values were only influenced by the adhesive strategy (p<0.001), aging (p<0.001) and interaction between them (p<0.013). After 24 hours, higher bond strength values were determined when the adhesive was applied with an ER strategy, although after 6-month aging a significant reduction was detected.
Conclusions: The antiseptic solutions evaluated for pulpal hemostasia seem not to affect µTBS. ER adhesive strategy yielded higher bond strength values immediately in comparison with SE strategy. However, both strategies showed similar values after aging. ER application mode was associated to a significant reduction on µTBS after 6-month water aging.