Jassim SD, Ibrahim LM. Correlation between Periodontal Health Status and Salivary Matrix Metalloproteinase-9 Levels in Smoker and Non-Smoker Chronic Periodontitis Patients (A Comparative Study) . J Bagh Coll Dent [Internet]. 2016 Dec. 14 [cited 2024 Apr. 27];28(4):128-33. Available from: https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/1511