Evaluation of the Effect of Salivary Melatonin Levels on Postoperative Pain and Sleep Quality Following Endodontic Treatments Performed at Different Days and Times

Standardized root canal treatment performed on asymptomatic mandibular molars. Procedures include local anesthesia, rubber dam isolation, access cavity preparation, cleaning and shaping with rotary instruments, irrigation with NaOCl and EDTA, and obturation using a standardized protocol. Saliva samples are collected prior to treatment for melatonin analysis. Postoperative pain and sleep quality are assessed using validated questionnaires.