Fig. (4) Representative image of cleaning promoted by rotary instrumentation with the ProTaper system. (A). Debris present in the canal lumen (arrow); (B). Area cleaned by instrumentation (arrow); (C). Debris in the isthmus region (arrow); (D). Isthmus region without debris (arrow); (E). Canal lumen without presence of debris (arrow); (F). Presence of debris in the isthmus region (arrow). HE - 40 X.