LEO #25. S-shape with separated lentulo in middle third. We decided to retreat. 2 confluent canals. After some time of manual instrumentation fragment was bypassed and apex achieved. But.... 15 K-file separated in apical third... Both fragments was successfully bypassed and canals cleaned and shaped. Instrumentation: Profiles, mtwo(for gutta) and manual files. Irrigation: 5 % NaOCl and EDTA. PUI. Obturation: Gutta and sealer. 5 month recall.