The application of 0.05% chlorhexidine digluconate after polyalkenoic acid conditioning (Cavity Conditionert) of dentin and prior to application of resin-modified glass ionomer cement (Fuji II LCt) should be avoided.
SUMMARYPurpose: The aim of this study was to investigate the effect of chlorhexidine digluconate (CHX) application on the shear bond strength (SBS) of a resin-modified glass ionomer cement (RMGIC) to polyalkenoic acid-preconditioned dentin after 24 hours, six months, and 12 months of water storage at 378C. Materials and Methods: Cylindrical molds, placed on flat, polyalkenoic acid (Cavity Conditionert [GC]) preconditioned dentin surfaces of 90 human teeth embedded in resin, were filled with Fuji II LCt (GC), a RMGIC, with (n=45) or without (n=45) the prior application of a 0.05% CHX solution. Within each group, SBS was determined after 24 hours (n=15), six months (n=15), and 12 months (n=15) of storage in water at 378C. The results were analyzed with two-way analysis of variance followed by Tukey multiple means comparisons (p,0.05). The type of bond failure (adhesive/cohesive/ mixed) was noted and the results were analyzed with chi-square test (p,0.05).Results: After 24 hours, the SBS of RMGIC was not significantly different with (9.0 6 2.8 MPa) or without (8.360.6 MPa) the application