Background: One of the main objectives of the root canal treatment is the shaping and cleaning of the root canal without changing the outline of the root canal from the preoperative shape. Nickel Titanium files are some of tools used in producing proper cleaning and shaping of the canal. These files have different designs and type of motion that vary in its shaping and cleaning ability.
Objective: To evaluate the debris extrusion of dentin after the use of 3 different NiTi filling systems with different irrigations.
Materials and Methods: This study was concerned with comparing and evaluation the amount of apical extrusion of debris after preparation with three files systems using quantitative method by pre and post preparation weighting of the tubes collecting the apically extruded debris during the canal preparation.
Results: These results might be due to the viscosity of MTAD which is higher than hypochlorite. This may cause entrapment of the dentin debris inside the canal and prevent its extrusion from the apex and the great taper of M Pro files (25# .06 taper) with it's rotational movement so it touch all the canal walls with a great dentine removal.
Conclusion: In view of the results of the present study, the following conclusions can be drawn: Highest debris extrusion produced with using M-pro files. NaOCl produced more cleaning and shaping than MTAD than Saline. Lowest debris extrusion produced with using 2shape files.
Keywords: MTAD, M-PRO, PROTAPER, 2-SHAPE