Figure 3. SEM micrographs of replicas of root canal walls that were bonded with self-etch adhesives: (A) Tyrian/One-Step Plus, a two-step self-etch system; (B) Xeno III, a one-step self-etch adhesive; and (C) One-Up Bond F, a one-step self-etch adhesive. Numerous fluid droplets (pointers) were present on the surfaces of the polymerized adhesives. (D) Bar chart comparing the number of fluid droplets/1000 µm² of adhesive surface in the 6 adhesive groups (N = 20). Groups with the same lower-case letter over the top of the bar are not statistically significant (P > 0.05). Abbreviations: AB, All-Bond 2; SB, Single Bond; OS+, One-Step Plus; T/O, Tyrian SPE/One-Step Plus; XE, Xeno III; and OUB, One-Up Bond F.