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Free gingival margin

The free gingival margin is the interface between the sulcular epithelium and the epithelium of the oral cavity. This interface exists at the most coronal point of the gingiva, otherwise known as the crest of the marginal gingiva.

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Because the short part of gingiva existing above the height of the underlying alveolar bone, known as the free gingiva, is not bound down to the periosteum that envelops the bone, it is moveable. However, due to the presence of gingival fibers such as the dentogingival and circular fibers, the free gingiva remains pulled up against the surface of the tooth unless being pushed away by, for example, a periodontal probe or the bristles of a toothbrush.

v • d • e Periodontology and Implant Dentistry
Tissues of the periodontium and their physiologic entities	Alveolar bone - Biologic width - Cementum - Free gingival margin - Gingiva - Gingival fibers - Gingival sulcus - Junctional epithelium - Mucogingival junction - Periodontal ligament - Sulcular epithelium - Stippling
Pathogenesis	A. actinomycetemcomitans - B. forsythus - Capnocytophaga sp. - F. nucleatum - P. gingivalis - P. intermedia - T. denticola
Pathologic entities	Calculus - Edentulism - Fremitus - Gingival enlargement - Gingival pocket - Gingivitis - Horizontal bony defect - Occlusal trauma - Periodontal pocket - Periodontal disease - Plaque - Recession - Vertical bony defect
Diagnosis, treatment planning, prevention and chemotherapeutic agents	Brushing - Bleeding on probing - Chlorhexidine gluconate - Flossing - Hydrogen peroxide - Mouthwash - Oral hygiene - Tetracycline - Triclosan
Periodontal armamentarium	Currette - Membrane - Probe - Scaler
Conventional therapy	Debridement - Scaling and root planing
Surgical therapy and periodontal surgery	Apically positioned flap - Bone graft - Coronally positioned flap - Crown lengthening - Flap debridement - Free gingival graft - Gingivectomy - Guided bone regeneration - Guided tissue regeneration - Implant Placement - Lateral pedicle graft - Pocket reduction surgery - Sinus lift - Subepithelial connective tissue graft
Other specialties	Endodontology - Orthodontology - Prosthodontology