Fig. (7) Histological findings in furcation defect at 10 days for FGF2-loaded collagen scaffold group. (A) The furcation defect was occupied with collagen scaffold. Alveolar bone induction was frequently demonstrated. (B) Higher magnification image of the framed area (1) in (A). Infiltration of cell and blood vessel-like tissue were apparent in the FGF2-loaded collagen hydrogel scaffold. (C) Higher magnification image of the framed area (2) in (A). Newly formed bone involved many osteoblastic cells and osteocyte-like cell. Col, collagen hydrogel scaffold; PB, preexisting bone; NB, new bone; R. root; arrowheads, apical notches. Staining: hematoxylin and eosin. (Scale bars represent 1 mm (A), 100 µm (B, C)).
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