Instruments were used in the canal with first series files, one by one in proper order. Working length was decreased for each file in 2 mm with respect to the apical foramen. Irrigation was conducted with sodium hypochlorite. The master file was used apically between every usage of the other files.
Se inició con la instrumentación del conducto mediante limas de la primera serie, una por una en su respectivo orden, disminuyendo la longitud de trabajo para cada lima 2 mm con respecto del ápice e irrigando con hipoclorito de sodio y recapitulando con la lima maestra apical entre cada lima.