Floating Teeth Radiographic Sign — NDEB AFK MCQ

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HardRadiology & ImagingFloating Teeth Radiographic SignNDEB AFK

Which dental radiographic finding is classically described as 'floating teeth' (teeth appearing to float in space due to severe surrounding bone loss)?

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Correct answer: B — Langerhans cell histiocytosis (eosinophilic granuloma)

The 'floating teeth' appearance describes teeth that appear to lack supporting bone, giving the impression of floating in soft tissue. This radiographic finding is classically associated with Langerhans cell histiocytosis (LCH, formerly histiocytosis X), which causes destructive lytic lesions of the alveolar bone. LCH can be localised (eosinophilic granuloma — best prognosis) or disseminated (Hand-Schüller-Christian disease, Letterer-Siwe disease). Other conditions that can produce floating teeth include severe periodontitis, leukemic infiltrates, and metastatic disease.

Reference: Neville – Oral and Maxillofacial Pathology, 4th ed., 2016