Fig. 4
From: Synergistic effect of secondhand smoke and apical periodontitis on lung tissue damage in rats
(a) Representative images of significant airspace enlargement and morphological destruction in rat lung tissue after inhalation of cigarette smoke, with or without apical periodontitis (HE staining, magnification ×200). These were assessed using histopathologic assessment, including (b) mean linear intercept values, (c) mean transsectional wall length, (d) volume density of alveolar septa, and (e) bronchial wall thickness. Data are presented as representative images or expressed as mean ± standard deviation. *p ≤ 0.05, **p ≤ 0.005, ***p ≤ 0.0005, ****p ≤ 0.0001.
