Unit
- Gingiva: The gingiva is the visible mucosa surrounding the teeth, forming a protective seal. It comprises free gingiva, attached gingiva, and interdental papillae. Healthy gingiva appears pink, firm, and stippled, reflecting adequate keratinization and connective tissue support.
- Periodontal Ligament (PDL): The PDL is a fibrous connective tissue connecting the tooth root to the alveolar bone. It provides tooth support and acts as a shock absorber during mastication. It contains sensory nerves and blood vessels essential for proprioception and nutrition.
- Cementum: Cementum is a calcified tissue covering the tooth root, providing attachment for PDL fibers. It is avascular and continues to form throughout life, aiding in repair and compensating for occlusal wear.
- Alveolar Bone: The alveolar process is the bony ridge that supports the tooth sockets. It undergoes constant remodeling in response to forces and can be resorbed in periodontal disease, leading to tooth mobility.
- Mucogingival Junction: This is the line demarcating the attached gingiva from the alveolar mucosa. It is an important landmark in periodontal assessment and determines the width of attached gingiva.
- Gingival Sulcus and Pocket: The sulcus is the shallow space between tooth and gingiva, normally 1-3 mm deep. In disease, it deepens into a periodontal pocket, indicating loss of attachment.
- Junctional Epithelium: This specialized epithelium attaches the gingiva to the tooth surface via hemidesmosomes. It acts as a barrier against bacterial invasion and is the first line in periodontal defense.
- Connective Tissue Attachment: Collagen fibers (gingival and transseptal) anchor soft tissue to cementum and bone, providing gingival stability and resisting mechanical forces.
- Vascular Supply: Periodontal tissues receive blood from the supraperiosteal arterioles and PDL vessels. Adequate perfusion is critical for healing and immune response.
- Innervation: Sensory innervation from trigeminal nerve branches provides proprioception and pain perception, allowing the periodontium to respond to external stimuli.
- Biologic Width: The combined dimension from the gingival sulcus base to the crest of alveolar bone, comprising sulcular epithelium, junctional epithelium, and connective tissue attachment. It averages 2.04 mm and is vital in restorative margin placement to prevent chronic inflammation and attachment loss.
- Gingival Crevicular Fluid (GCF): A transudate or exudate that flows into the gingival sulcus, derived from the gingival capillaries. In health, small amounts are present; in disease, volume and composition change significantly. Analysis of GCF components serves as a non-invasive diagnostic indicator of periodontal inflammation.
- Periodontal Biotype: The thickness and morphology of the gingiva and underlying alveolar bone, typically described as thin scalloped or thick flat. This classification influences treatment planning because thin biotypes are more prone to recession and require careful surgical technique to maintain aesthetic outcomes.
- Interdental Papilla: The gingival tissue occupying the space between two adjacent teeth, with the shape determined by the contact point, root proximity, and osseous crest. Its preservation is critical for food impaction prevention and aesthetic appearance. Loss of papilla leads to open gingival embrasures.
Scope of Practice
Role: Periodontal Assistant/Coordinator
Within scope:
- Educating patients on periodontal anatomy and disease process
- Assisting with periodontal charting and documentation under supervision
- Preparing patient education materials and model displays
- Scheduling hygiene maintenance appointments
- Assisting with non-surgical therapy setup and patient comfort
Outside scope:
- Performing periodontal probing or diagnosing disease
- Administering local anesthesia or prescribing medications
- Performing sulcular irrigation or debridement
- Interpreting radiographs or diagnostic tests
- Providing definitive treatment advice without clinician direction
Quick Revision
- The periodontium includes gingiva, PDL, cementum, and alveolar bone, each with distinct structure and function.
- The gingival sulcus becomes a pocket when depth exceeds 3 mm, indicating disease.
- Junctional epithelium serves as the primary seal; its integrity is crucial for periodontal health.
- Periodontal assistants educate patients on anatomy but do not diagnose or perform clinical probing.
Disclaimer
Educational use only. Not intended for practical surgery, incisions, or other surgical procedures. It does not qualify you to perform physical operations.