Fig. (3) Representative image of cleaning promoted by the Reciproc instrumentation system (Reciproc Group). (A). Debris present in the canal lumen (arrow); (B). Area cleaned by instrumentation (arrow); (C). Debris in the isthmus region (arrow); (D). modification of anatomy of canal lumen after instrumentation (arrow); (E). and (F). Isthmus region with presence of debris (arrow). HE - 40 X.