Fig. 3From: The effect of dentin surface pretreatment using dimethyl sulfoxide on the bond strength of a universal bonding agent to dentinFailure modes in (a) total-etch group with DMSO pretreatment, (b) total-etch group without DMSO pretreatment, (c) self-etch group with DMSO pretreatment, and (d) self-etch group without DMSO pretreatment. Red and black arrows show adhesive and mixed failure patterns respectivelyBack to article page