Figure 3. The effect of PARP inhibitor PJ34 on vascular permeability of gingivomucosal tissue (upper panel) and on alveolar bone destruction at the mediolingual root (lower panel) in ligature-induced periodontitis in the rat. Data are mean + SEM; n = 9 in both groups. a, significantly different (p < 0.05) from the contralateral side (non-ligated right side); b, significantly different (p < 0.05) from control (vehicle treatment).