Srikumar G.P.V.; Geeta Nishad; Siddharth Bardia; Megha Yadav; Amisha Jain; Kriti Dubey. Comparative Evaluation of Protaper Universal, D-Race, R-Endo and Neoendo Ni-Ti Rotary Retreatment File Systems in the Removal of Guttapercha And Root Canal Sealer With or Without the Use of Solvent During Endodontic Retreatment: An In-Vitro Stereomicrosco. JCLM 2023, 11, 1892-1908.