Comparison of two different file systems on postoperative pain after root canal instrumentation: A randomized controlled trial

Abstract Introduction : In this study post instrumentation pain is evaluated between rotary hyflex CM files and conventional k-files at different time intervals. Methodology : fifty patients were equally assigned into two groups and instrumented using hyflex cm or conventional files. VAS for pain was noted before the start of a root canal and after the procedure at 12, 24, and 48 hours. Results : There was no significant difference at 12, 24, and 48 hours with P values being 0.127, 0.867, and 0.846 respectively. Conclusion : There is no significant difference in causing post-instrumentation pain between hyflex CM and conventional files at different time intervals. However, when accessing preop pain of the conventional file group, it had more pain mean score compared to hyflex group. According to this study, Conventional files may be able to slightly decrease the chances of post-instrumentation pain more than hyflex CM instrumentation.