SEM micrograph of a dentin surface cut with a superfine-grit diamond bur and conditioned with PLP, which was not light-cured, followed by rinsing with acetone for 1 minute. This shows complete removal of the smear layer and plugs, as well as complete dissolution of peritubular dentin as in Figure 4A. The intertubular dentin appears more aggressively etched compared to that cut with a regular-grit bur in Figure 4A.