Necrotic Pulp

The goal of this clinical trial is to compare the effect of cold atmospheric plasma versus sodium hypochlorite as irrigating solutions in necrotic single rooted teeth. The main questions it aims to answer are: * Does the use of sodium hypochlorite solution or cold atmospheric plasma as root canal irrigant will have the same effect on the level of postoperative pain in necrotic single rooted teeth? * Does the use of sodium hypochlorite solution or cold atmospheric plasma as root canal irrigant will have the same effect on the level of MMP -9 in necrotic single rooted teeth? Researchers will compare cold atmospheric plasma to sodium hypochlorite solution as root canal irrigant to see if cold atmospheric plasma works to have the same effect on the level of postoperative pain and levels of MMP -9 in necrotic single rooted teeth. Participants will: * be asked to rate their pain level according to the given instructions and will be asked to return for follow up after 2 days to hand the pain scale chart. * be instructed to call the operator and will be permitted to take Ibuprofen 400 mg not more than 6 hours apart and to record their tablet intake within 48 hours postoperatively, in case of severe or persistent pain. * be referred to the fixed prosthodontics department for final restoration.

Brief Summary Postoperative pain is a common complication following root canal treatment, particularly in necrotic teeth with asymptomatic apical periodontitis. Although obturation technique has been suggested as a contributing factor to postoperative discomfort, direct clinical comparisons between commonly used methods remain limited. Cold lateral condensation has traditionally been considered the standard obturation technique, while warm vertical obturation systems such as Obtura II have gained popularity due to their potential for improved adaptation of gutta-percha. This randomized controlled clinical trial aims to compare postoperative pain experience and treatment outcomes following cold lateral condensation and warm vertical obturation in single-rooted necrotic teeth. Postoperative pain will be assessed during the early healing period, along with patient-reported outcomes and short-term clinical and radiographic healing. The results of this study are expected to provide clinically relevant evidence to support evidence-based obturation technique selection and improve patient comfort in endodontic practice.

This trial aims to study the effect of photoactivated disinfection using Diod laser (810 nm) to activate photosensitive nanoparticle chitosan as an endodontic irrigant versus sodium hypochlorite followed by saline and then EDTA 17% on 1) postoperative pain and 2) the success of revascularization in patients with necrotic immature maxillary anterior teeth using a randomized clinical trial design.