To investigate The Effect of Sodium hypochlorite and Chlorhexidine as cavity Disinfectants on the post operative pain and Success of Partial Caries Removal in deep carious lesion with moderate pulpitis in permanent teeth

Study Design: Intervention Research Question : To investigate whether the use of 2% chlorhexidine and 5.25% sodium hypochlorite can improve the clinical and radiographic outcome after partial caries removal in deep carious lesion P (Population) - Mature Permanent Mandibular molars with deep carious lesion involving inner two third of dentine I (Intervention) - - Partial caries removal using 2% chlorhexidine/5.25% sodium hypochlorite as cavity disinfectant..

C (Comparison) - Partial caries removal using saline as cavity disinfectant. O (Outcome) - Assessment of clinical and radiographic success at 12 months follow up.

-To assess incidence and reduction in pain post operatively at every 24 hours till 1 week.

Inclusion Criteria:

1. The patient should be ≥18 years of age.
2. Restorable mature permanent 1st and 2nd Mandibular molars with extremely deep caries (≥2/3 dentine involvement)
3. Tooth should give positive response to pulp sensibility testing.
4. Clinical diagnosis of moderate pulpitis.
5. Radiographic finding of periapical index (PAI) score ≤2.
6. Healthy periodontium (probing pocket depth ≤3 mm and mobility within normal limit)

Exclusion Criteria:

Presence of vertical root fracture Presence of root perforations ASA-3 or ASA-4 according to the classification of the American Society of Anesthesiologists) Presence of root resorption Combined endodontic-periodontic lesions. Pregnancy