14. Which one is the advantage of step back technique? a. Diffucult to irrigate apical region b. More chances of pushing debris preiapically c. Time consuming d. Tendency to straighten the curve canal c. Creates small apical constriction with larger instruments used at successively decreasing lengths to create a taper

The correct answer is:<br /><br />c. Creates small apical constriction with larger instruments used at successively decreasing lengths to create a taper<br /><br />The step back technique is a method used in endodontics to shape the root canal during root canal therapy. It involves using larger instruments at successively decreasing lengths to create a taper in the canal. This technique has the advantage of creating small apical constriction, which can help in the successful removal of the apical portion of the pulp tissue and facilitate the placement of the gutta-percha cone during obturation. By creating a taper, it also allows for better adaptation of the filling material within the canal.