This randomized controlled trial will investigate if maintaining apical patency-a technique where a small file is gently moved past the root's end during cleaning-affects pain after a root canal. The study will include 48 adult patients needing root canal treatment on a back molar tooth with a dead nerve and infection at the root tip. Participants will be randomly assigned to one of two groups: one where the apical patency technique is used, and one where it is not. All other treatment steps will be identical. Patients will record their pain levels on a standard scale (0-100 mm Visual Analog Scale) at 6, 12, 24, 48, and 72 hours after the procedure. The goal is to determine if this specific technique influences the intensity and duration of post-treatment pain
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Post-operative Pain Intensity
Timeframe: 6 hours after the completion of the root canal procedure
Post-operative Pain Intensity at 6 hours
Timeframe: 6 hours after the completion of the root canal procedure.
Post-operative Pain Intensity at 12 hours
Timeframe: 12 hours
Post-operative Pain Intensity at 48 hours
Timeframe: 48 hours
Post-operative Pain Intensity
Timeframe: 12 hours after the completion of the root canal procedure
Post-operative Pain Intensity
Timeframe: 24 hours