Case-Control Studies 3 Chronic Periodontitis Diabetes Mellitus, Type 2 Humans 3 Periodontal Attachment Loss 3 Saliva 3 case control study 3 chemistry 3 chronic periodontitis 3 complication 3 human non insulin dependent diabetes mellitus 3 periodontal disease saliva 3 Matrix Metalloproteinase 8 2 Matrix Metalloproteinase 9 2 case-control 2 diabetes mellitus 2 gelatinase B 2 matrix metalloproteinase 2 metabolism 2 neutrophil collagenase 2 periodontal parameters 2 Adult 1 Aged 1 Aged, 80 and over 1 Chronic periodontitis 1 Dental Plaque Index 1 Female 1 Ferritin 1