Kumar P M, Reddy N R, Deepa A, Babu D S M, Kumar A K, Chavan V. Comparison of matrix metalloproteinase-3 and tissue inhibitor of matrix metalloproteinase-1 levels in gingival crevicular fluid in periodontal health, disease and after treatment: A clinico biochemical study. 3 2012; 6 (6) URL: http://idai.ir/article-1-3376-en.html