Comparing Obturation Using Bioceramic Nano-coated Gutta-percha With Bioceramic Sealer Versus Traditional Gutta-percha With Resin Sealer for Reducing Postoperative Pain and Swelling After Root Canal Treatment in Necrotic Single-rooted Teeth.

A randomized clinical trial will compare two root canal filling approaches in necrotic single-rooted teeth. The test group will receive bioceramic mono-block obturation using bioceramic nano-coated gutta-percha with a bioceramic sealer, while the control group will receive traditional gutta-percha with a resin-based sealer. The main aim is to determine whether the bioceramic system can reduce postoperative pain and swelling within 48 hours after treatment compared with the conventional method. Patients aged 20-55 years who have necrotic single-rooted teeth and meet specific clinical and radiographic criteria will be recruited from the outpatient clinics of the Faculty of Dentistry, Cairo University. Postoperative pain will be measured using a visual analogue scale, and swelling will be assessed using a standardized swelling score at 24 and 48 hours. The study hypothesizes that the bioceramic mono-block technique, due to its improved sealing ability and bioactivity, may lead to less postoperative discomfort and better early clinical outcomes than the gold-standard resin-sealer technique. The findings are expected to provide evidence to guide clinicians on whether adopting bioceramic nano-enhanced obturation can improve patient-centered outcomes after root canal treatment.