Fábio Carmona Tirintan; Álvaro Henrique Borges; Jesus Djalma Pécora; Manoel dos Santos da Silva Neto; Matheus Gehrke Barbosa; Cyntia Rodrigues de Araújo Estrela. Verification of Remaining Filling Materials in Flattened Oval-Shaped Root Canals After Use of Several Endodontic Retreatment Protocols. RSBO 2021, 17, 72-78.