Ayuda Buscar en la ayuda Buscar en la ayuda Evaluation of efficacy of Protaper files, HERO SHAPER GOLD files, ProTaper Universal retreatment files and R- Endo retreatment files with and without use of passive ultrasonic irrigation using Irrisafe file for the removal of Gutta-percha and AH plus sealer from the root canals under dental operating microscope Dattasai Kiran, K. [1] ; Upendranatha Reddy, N. [1] ; Gopikrishna Reddy, M. [1] ; Sujayeendranatha, E. [1] ; Nagalakshmi Reddy, S. [1] ; Anusha, Y.