Alveolar ridge preservation following tooth extraction is an important aspect in modern treatment planning. Aim of this current study was to evaluate and compare the efficacy of autogenous tooth dentin block graft with allogenic bone graft block in preserving alveolar ridge dimension after tooth extraction at 12 months. 20 subjects require at least three teeth extraction were selected and divided into 3 groups - group I: autogenous tooth block with PRF membrane placement, group II: DFDBA block with PRF membrane placement, group III: Control group i.e., socket left ungrafted. CBCT analysis was done immediately after extraction and at 12th month. At 12 month group I and II showed comparable socket preservation compared to group III. Dentin graft can be a good alternative for socket preservation.