ENT · Oral Pathology
The facts most likely to be tested
Gingivitis is primarily caused by the accumulation of dental plaque (biofilm) resulting in gingival inflammation without loss of attachment.
The hallmark clinical presentation is erythema, edema, and bleeding on probing of the gingival tissues.
Gingivitis is a reversible condition, whereas periodontitis involves irreversible destruction of the periodontal ligament and alveolar bone.
Pregnancy-associated gingivitis is driven by hormonal shifts, specifically elevated progesterone, which increases vascular permeability and the inflammatory response to plaque.
Drug-induced gingival hyperplasia is a classic side effect associated with phenytoin, calcium channel blockers (e.g., nifedipine), and cyclosporine.
Necrotizing ulcerative gingivitis (NUG) presents with punched-out interdental papillae, fetor oris (halitosis), and pseudomembrane formation.
The first-line management for plaque-induced gingivitis is mechanical debridement (scaling and root planing) and improved oral hygiene (brushing and flossing).
Vignette unlocked
A 28-year-old female at 24 weeks gestation presents for a routine prenatal visit. She reports that her gums bleed easily when she brushes her teeth. On physical examination, the gingiva appears erythematous, edematous, and shows bleeding on probing at the gingival margins. There is no evidence of tooth mobility or recession. Her oral hygiene is fair, but she has noted increased sensitivity in the last month.
What is the most appropriate initial management for this patient?
Professional dental cleaning and reinforcement of oral hygiene
The patient presents with pregnancy-associated gingivitis, which is managed by plaque control and mechanical debridement as described in the first and fourth bets.
Full handout
High yield triage
Etiology / Epidemiology
Caused by plaque accumulation and poor oral hygiene. Diabetes mellitus and pregnancy are major systemic risk factors.
Clinical Manifestations
Presents with erythematous, swollen gingiva that bleeds easily upon probing. Absence of attachment loss distinguishes it from periodontitis.
Diagnosis
Clinical diagnosis via periodontal probing. Absence of radiographic bone loss confirms the diagnosis.
Treatment
Oral hygiene instruction and professional dental prophylaxis are first-line. Avoid chlorhexidine long-term due to staining.
Prognosis
Reversible with proper hygiene. If untreated, progresses to periodontitis and potential tooth loss.
Full handout
Epidemiology & Etiology
Gingivitis is the most common form of periodontal disease, affecting nearly all populations. Primary etiology is the buildup of bacterial plaque (biofilm) at the gingival margin. Systemic modifiers include hormonal changes (pregnancy gingivitis), uncontrolled diabetes, and certain medications like phenytoin or calcium channel blockers.
Pertinent Anatomy
The gingiva is the mucosal tissue covering the alveolar bone. The gingival sulcus is the space between the tooth and the free gingiva; inflammation here is the hallmark of early disease. Unlike periodontitis, the junctional epithelium remains attached to the tooth surface.
Pathophysiology
Bacterial colonization triggers a host inflammatory response, leading to vasodilation and increased capillary permeability. This results in the classic erythema and edema of the gingival tissues. Chronic inflammation leads to the breakdown of collagen fibers, but the alveolar bone remains intact at this stage.
Clinical Manifestations
Patients typically report gingival bleeding during brushing or flossing. Examination reveals erythematous, edematous, and shiny gingival margins. Red flags include deep periodontal pockets (>3mm) or tooth mobility, which indicate progression to periodontitis.
Diagnosis
Diagnosis is clinical, based on the presence of inflammation without radiographic bone loss. The periodontal probe is the gold standard tool to measure sulcus depth. A depth of <3 mm is considered healthy; deeper measurements suggest disease progression.
Treatment
The cornerstone of therapy is professional dental prophylaxis (scaling) to remove calculus. Patients must maintain meticulous oral hygiene with daily brushing and flossing. Chlorhexidine gluconate is an effective adjunct but is limited by tooth staining and taste alteration.
Prognosis
Gingivitis is entirely reversible with consistent plaque control. Failure to treat leads to periodontitis, characterized by irreversible attachment loss and destruction of the periodontal ligament.
Differential Diagnosis
Periodontitis: presence of radiographic bone loss
Acute Necrotizing Ulcerative Gingivitis: punched-out interdental papillae
Herpetic Gingivostomatitis: multiple painful vesicles
Leukemia: gingival hypertrophy and spontaneous bleeding
Vitamin C Deficiency: scurvy presenting with friable, hemorrhagic gingiva