miniKUT EZP was used at 800 rpm directly without any prior use of handfiles after decay removal, access cavity preparation and orifice location. The working length was established with a 31 mm number 10 K file. miniKUT OS 15/07 at 800 rpm was then used to relocate the canals in the coronal third prior to the final shaping. miniKUT 25/05 was finally used at 800 rpm, until the apical foramen and the corresponding gutta-percha cone was adapted to the canal and cone fit performed. Canals were filled with the continuous wave technique.

Treatment of an upper second left molar with a deeply distal decay and pulp exposure. Patient was suffering from spontaneous pain increased at night. A diagnosis of irreversible pulpitis was established and a root canal treatment was performed in a single session. All canals were challenging because they were very narrow and long (23 to 25 mm) especially the mesio-buccal and disto-buccal canals. The disto buccal canal had also a small apical abrupt curvature.