Torres CR, da Silva EG, Gomes AP, Moreira CS, Martinho FC, Coelho MP, JĂșnior LR. Cone-beam Computed Tomographic Analysis: Comparison of the Efficacy of Two Rotary Retreatment Systems for Removal of Filling Material from Primary Teeth Obturated with Contemporary Endodontic Sealers. World J Dent 2015; 6 (3):129-137.