Simplified Papilla Preservation Flap(SPPF) and Enamel Matrix Derivative(EMD) With or Without Connective Tissue(CTG) Wall for the Treatment of Non Contained Infrabony Defects. A Randomized Controlled Clinical Trail

Inclusion Criteria: * Patients willing to participate in the study. * Participants aged ≥18 years to 55 years. * Presented with non contained infra bony defects. * Presence of at least 1 non contained infra bony defect(IBD) with a pocket probing depth ≥6mm after reevaluation of the hygienic phase and a depth of IBD ≥3mm as detected on radiographs, with radiographic angulation of ≥37⸰ , and exhibiting a 1 or 2 wall infra bony defect15(assessed by a bone sounding and confirmed intrasurgically) * Patient's full mouth plaque score and bleeding score \<20% at the time of surgical procedure. * No history of periodontal surgery at the experimental site. Exclusion Criteria: * Grade III mobility, endodontically treated teeth. * Pregnant and lactating females. * History of tobacco smoking . * Patients with systemic disease. * Known allergy or hypersensitivity to EMD. * Presence of pulpal and peri apical involvement