The goal of this clinical study was to evaluate the effect of using different irrigation solutions in the final irrigation of root canal treatment procedures on the intensity of postoperative pain and periapical tissue healing in patients presenting with mandibular molars with chronic apical periodontitis. The main question it aims to answer is: \- Does controlled irrigation with chlorhexidin and N-asetil sistein in root canal treatment reduce the severity of postoperative pain? In the chlorhexidin group, unlike the control group, each root canal was irrigated with 3 mL %2 chlorhexidin solution in the final irrigation. In the N-asetil sistein group, unlike the control group, each root canal was irrigated with 3 mL 200 mg/ml N-asetil sistein solution in the final irrigation.
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