Periodontology

Gingival Crevicular Fluid is a serum-like exudate that flows from the gingival sulcus into the oral cavity. It serves as a crucial diagnostic medium and plays a vital role in the host defense mechanism against periodontal pathogens.

Immunological Characteristics

• Predominant Immunoglobulin: IgG (contrasts with saliva where IgA predominates)
• T:B Lymphocyte Ratio: 1:3 (higher B cell concentration indicates active antibody production)
• Inflammatory Nature: Primarily exudative, reflecting the body's response to bacterial challenge

Clinical Significance

• Drug Expression: Tetracycline and Metronidazole are expressed in GCF, making it useful for targeted antimicrobial therapy
• Diagnostic Value: GCF volume and composition change with gingival inflammation, serving as biomarkers for periodontal disease progression
• Collection Methods: Non-invasive collection using absorbent papers or micropipettes for research and diagnostic purposes