Figure 1From: Impact of Genetic Polymorphisms on the Smoking-related Risk of Periodontal Disease: the Population-based Study SHIPPeriodontitis as multifactorial disease: development of periodontal disease from bacterial challenge producing plaque to severe disease. Abbreviations: Fcγ: Fcγ-receptors; IL-1: polymorphisms of interleukin-1 clusters; MMP-1: metalloproteinase-1 (collagenase); MPO: myeloperoxidase; NAT2: N-acetyltransferase 2.Back to article page