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The influence of the number of refreshments of demineralized water or 2% NaOCl applied with either flow rate 0.05 mL s−1 (dark grey) or 0.1 mL s−1 (light grey) on biofilm removal (%) after a total exposure time of 15 min from a lateral canal‐ (a) or isthmus (b)‐like structure. Significant difference between the irrigants is indicated by an *.
