Figure 2. Histological aspects of the furcation area. (A) Low magnification of a ligated molar from the placebo-treated group. (B) Higher magnification: Osteoclasts and resorption pits can be observed (OC/arrows) in the bone area. (C) Periodontal ligament region: Disarrangement of periodontal ligament fibers can be observed. Periodontal ligament (PL), alveolar bone (B), osteoclast (OC). Scale bars: A, 0.2 mm; B, 0.1 mm; C, 0.05 mm.