Fig. (3) Histomorphometric measurements. A) Defect area (1) and defect length (2). B) Higher magnification of furcation: area of bone (3), length of periodontal ligament-like tissue (4), length of cementum-like tissue (5), length of epithelial tissue and exposed root surface (6). Each parameter was calculated as a percentage in relation to defect area and length. N: notch.