Figures 2 and 3. Figure 2. (A) Patient 2, test graft: Puros (P) particles underwent resorption. Puros particles were so well incorporated in new bone (NB and P/NB) and immature bone (IB) (in dark red) that their delineation was barely perceptible (original magnification ×4). (B) Patient 2, control graft: New bone (NB) grew on the outer edges and inside a former Haversian canal of a large Bio-Oss (B) particle. Numerous smaller pieces of Bio-Oss were not incorporated in new bone in contrast to incorporated demineralized freeze-dried bone allografts (D) particles (original magnification ×4). Figure 3. (A) Patient 3, test graft: Puros (P) particles were well incorporated and often difficult to differentiate from new bone (NB). The entire bone core demonstrated excellent integrity with dense, thick trabeculae (original magnification ×4). (B) Patient 3, control graft: Bio-Oss (B) particles made up a substantial portion of the cancellous bone pattern and were surrounded by new bone (NB) (original magnification ×4)