Figure 1From: Assessment of tissue oxygenation of periodontal inflammation in patients with coronary artery diseases using optical spectroscopy Relative concentrations of Hb (A) and HbO 2 (B) from healthy, gingivitis and periodontitis sites from CAD patients. Relative hemoglobin concentrations were calculated using the visible region (510 – 620 nm) of the reflected light spectrum. Vertical bars denote 0.95 confidence intervals.Back to article page