Background: Different single-file systems have been marketed with the ability to prepare root canals with only one instrument. The present study was conducted to compare Protaper and Wave One file systems in reducing post operative pain. Materials & Methods: The present study was conducted in the department of Endodontics on 60 patients. The patients were divided into 2 groups of 30 each. Cleaning and shaping of root canals was done using PTN (Group I) and Wave One instruments (Group II). Status of postoperative pain was recorded, as described by the patient, according to the pre-established pain categories using VAS at each time points. Results: VAS score pre-operatively in group I was 52.6 and in group II was 48.6, after 24 hours was 29.4 in group I and 25.2 in group II, at 48 hours was 24.3 in group I and 23.6 in group II, at 72 hours was 16.4 in group I and 11.2 in group II, after 1 week was 7.2 in group I and 1.2 in group II. The difference was significant (P< 0.05). Conclusion: Authors found that WaveOne has less pain score as compared to Protaper in single sitting root canal treatment.
Key words: Protaper, Pain, WaveOne