Introduction: This study aimed to compare the intensity of postoperative pain after single-visit root canal treatment of symptomatic or asymptomatic teeth following occlusal reduction. Methods: A total of 140 symptomatic or asymptomatic patients in need of root canal therapy were registered in this prospective, single-center, single-blind, randomized clinical trial. For all patients, root canal treatment was carried out in a single visit, and the teeth were restored using composite resin. The teeth were randomly allocated into two equal groups according to whether occlusal reduction was done or not. The patients' pain were assessed using a 0-3 verbal rate scale 1, 3, and 7 days following root canal treatment. The pain incidence and intensity were compared using the chi-square and Fisher's exact tests.
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Effect of occlusal reduction on pain relief
Timeframe: from enrollment to the end each patient called for a week to understand their pain levels and each of them called after 1st, 3th, 7th days treatment.