to assess the effectiveness of advanced PRF in combination of Demineralized freeze-dried bone allograft (DFDBA) as compared to collagen membrane in combination with Demineralized freeze-dried bone allograft (DFDBA) treatment of non-contained periodontal intraosseous defects in stage III periodontitis patients.
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Change in clinical attachment level (CAL)
Timeframe: CAL will be measured at base line, 3, 6, 9, 12 months postoperative