CONSORT Randomized Clinical TrialComparison of the Effect of Root Canal Preparation by Using WaveOne and ProTaper on Postoperative Pain: A Randomized Clinical Trial
Section snippets
Materials and Methods
This randomized clinical trial was approved by the Ethics Committee of Tehran University of Medical Sciences (Reg. No. 92/s/1421/130) and registered in www.irct.ir (IRCT2013071313970N1).
The sample size calculation, which was based on an error of alpha = 0.05 and a power of 0.8, indicated that ideally a sample size of 21 in each group would be required.
Forty-two consented patients between the ages of 15 and 55 years who were referred to the Endodontic Department of Tehran University of Medical
Results
The mean NRS scores at the various time intervals associated with each canal preparation technique are shown in Table 3. The intensity and duration of pain experienced after both appointments by patients in the WaveOne group were significantly higher than in the ProTaper group (P < .05) (Table 3, Table 4). In both groups the highest NRS scores were recorded 6 hours after each appointment, after which the NRS scores decreased; however, 12 hours after the second session in the ProTaper group, the
Discussion
The primary aim of this study was to investigate the influence of root canal instrumentation with WaveOne versus ProTaper Universal rotary files on the incidence and intensity of postoperative pain. Therefore, all other variables such as the type of irrigation were consistently kept similar in both groups without any preference regarding the use of 2% chlorhexidine over other irrigants. However, it has been shown that 2% chlorhexidine has similar antimicrobial effects as 5.25% sodium
Conclusion
Postoperative pain lasted longer and was more intense in patients treated with the WaveOne system compared with the ProTaper Universal system. However, the differences seen in the intensity of pain may not be clinically significant and did not affect the analgesic regime chosen by patients.
Acknowledgments
This study was supported by a grant from Tehran University of Medical Sciences (no. 92-03-69-22904).
The authors deny any conflicts of interest related to this study.
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