Figure 1.

Localization of GFP-positive cells in intact periodontal tissue. Visualization of BMCs in vivo on periodontal tissue. Arrows indicate osteoclast-like multinucleated giant cells (A) and macrophage-like cells in gingival epithelium (B) were GFP-positive, implying that GFP-positive images were confirmed to match BMCs. GFP-positive cells were also observed at the periodontal ligament (C), blood vessels (D), and dental pulp (E). A, multinucleated giant cells in resorption lacunae of alveolar bone; B, gingival epithelium; C, periodontal ligament; D, blood vessels in periodontal ligament; E, dental pulp. G, gingiva; AB, alveolar bone; P, periodontal ligament; DP, dental pulp; D, dentin.