Fig. 2

The effect of resin infiltration on the adhesive properties of WSLs. (A) The shear bonding strength of the Ctrl group, Bo group, and R-Bo group (n = 10). (B) Failure pattern analysis of the Ctrl group, D group, and DR group (n = 10). (C) The microleakage depth of the Ctrl group, Bo group, and R-Bo group (n = 15). (D) Representative SEM images of the Ctrl group, D group, and DR group (2000×, scale bar = 20 μm; 5000×, scale bar = 10 μm). The B zone: bonding agent; the E zone: enamel. *P < 0.01, **P < 0.001