DOI: 10.36347/sjams.2019.v07i04.026

Pages: 1502-1505

Aim: To compare the shaping ability of three different file systems with rotary instruments during the preparation of curved root canals in extracted teeth. Materials and Methods: total of 60 root canals with curvatures ranging between 25° and 35° were divided into three groups of 20 canals. Based on radiographs taken prior to instrumentation, the groups were balanced with respect to the angle and the radius of canal curvature. Canals were prepared to the following apical sizes Reciproc, twisted file, and OneShape: Using pre- and post-instrumentation radiographs, straightening of the canal curvatures was determined with a computer image analysis programme. Results: The mean total width of the prepared canals in the Reciproc group was greater than the TF groups at halfway to the orifice, the beginning of the curve, the apex of the curve, and the end‑point (P < 0.05). Mean absolute transportation was always <0.16 mm; however, significant differences occurred between the three systems at the orifice, halfway to the orifice, and the beginning of the curve (P < 0.05). Conclusions: Under the conditions of the study, Reciproc produced widest canal shapes. TF provided more centered apical preparation and maintained the original canal shape well.