Fig. 2From: Changes in salivary matrix metalloproteinase-3, -8, and -9 concentrations after 6 weeks of non-surgical periodontal therapyROC curve of MMP-3,-8 and -9 for periodontal disease diagnosis. Only MMP-3 was a significant salivary biomarker for diagnosis periodontal disease (p = 0.024, diagnosis reference value = 5.07 pg/mL)Back to article page