Abstract
Aim: The aim of this study was to compare the amount of postoperative pain after using three different nickel–titanium file systems. Materials and Methods: Ninety patients with necrotic molar pulps were selected and divided into three groups. Group I (n = 30) was instrumented with ProTaper Next (PTN) file system, Group II (n = 30) was instrumented using WaveOne reciprocating system, and Group III (n = 30) was instrumented using Twisted File system. All canals were instrumented and obturated in the same visit. Postoperative pain response of patients was evaluated using the visual analogue scale (VAS) score. Results: For VAS pain scores, a statistically significant difference was found between the PTN and WaveOne technique (P = 0.000). Statistically significant difference was also found between the Twisted File and WaveOne technique (P = 0.002). Conclusion: It can be concluded that the difference in the postoperative pain is related to the instrumentation technique. Reciprocating system, WaveOne resulted in maximum pain followed by Twisted File and PTN file system.
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