Assessment of Matrix Metalloproteinases-8 and -9 in Gingival Crevicular Fluid of Smokers and Non-smokers with Chronic Periodontitis Using ELISA.

Background: Matrix metalloproteinases (MMP)-8 is increased in smokers with chronic periodontitis (CP). The levels of MMP-9 have not been assessed in the periodontal tissues of smokers. Therefore, the aim of this study is to estimate the concentrations of MMP-8 and -9 in the gingival crevicular fluid (GCF) of smokers and non-smokers with CP.