A patient presents with generalized inflamed, bleeding gingiva throughout the mouth, with 2–3 mm probing depths everywhere. Tooth #23 (lower left lateral incisor) has 1 mm of gingival recession and a 2 mm pocket. What is the MOST appropriate periodontal diagnosis for this patient?

Correct answer: B. Generalized gingivitis with localized recession on #23

• A. Stage I periodontitis requires interdental CAL ≥1mm at ≥2 non-adjacent teeth — the single-site recession at #23 with generalized gingivitis does not meet staging criteria.
• B. CORRECT. The generalized bleeding and pocket depths are consistent with plaque-induced GINGIVITIS (no attachment loss at most sites, BOP present). Tooth #23 has 1 mm of recession — this represents localized attachment loss at a single site, potentially from a non-periodontitis cause (toothbrush abrasion, anatomy). The overall diagnosis is GENERALIZED GINGIVITIS with localized recession at #23, not periodontitis (which requires interdental CAL).
• C. Generalized periodontitis requires CAL and bone loss at multiple sites — not present here if pockets are 2–3 mm throughout.
• D. Localized periodontitis at #23 would require clinical attachment loss due to periodontal disease at that specific site. If the recession is from abrasion/anatomy without BOP or deep pocketing at #23, the correct diagnosis of the MOUTH is generalized gingivitis, not localized periodontitis.