FIGURE 4.

Graphical representation of the mean shear bond strength (SBS) of resin composite to MTA with and without PDA pretreatment at various time intervals. Error bars indicate 95% confidence interval. *Different upper-case alphabets denote significant difference between PDA-pretreated samples at various time intervals. Different lower-case alphabets denote significant difference between the untreated samples at various time intervals (p<0.05)
PDA: Polydopamine, MTA: Mineral trioxide aggregate