Figure Mandibular right first molar: A) initial radiograph, extensive
mesial caries, widening of PDL, double curvature (Bull’s eye view); B)
working length determination; C) cone fit confirmation; D) final
radiograph, obturation, apical seal, temporary restoration; E) 8-month
follow-up, coronal seal
Case 3
A 41-year-old woman, systematically healthy, was referred to the
endodontics department of the faculty due to the separation of the file
in the mesiobuccal canal of the mandible right first molar. The broken
file was retrieved by examining the radiograph with the help of
ultrasonic tips and the loop technique (Kamand, Suzhou, Zumax). The
framed material of the orifice shaper separated at the radix and the
broken file was bypassed using C-files #8,10,15 (VDW, Munich, Germany).
(Figure 5). After the bypass, shaping, and instrumentation of the
channels were done as described previously. The ethylene diamine
tetraacetic acid (EDTA) 17% (Master-dent, monroe, USA) irrigation was
the only deference. normal saline was used for final irrigation (Figure
6). Follow-up was done 9 months later and the patient reported no pain
or discomfort. Observing and examining the radiograph also showed the
success of the treatment process (Figure 6D) <Figures 5 &
6>.