Which radiographic sign is characteristic of Paget’s disease of bone (jaw)? A) Ground-glass appearance B) Cotton-wool appearance C) Target lesion D) Soap-bubble appearance
A – Dentigerous cyst surrounds crown of unerupted tooth. OKC and ameloblastoma can be multilocular; periapical granuloma is at apex, not crown.
B – Erythroplakia (highest malignant transformation rate, ~90% shows dysplasia/carcinoma). Leukoplakia also premalignant, but erythroplakia is more dangerous. mcqs in oral medicine and oral radiology pdf
B – Oral lichen planus (reticular form). Bilateral, lacy (Wickham’s striae) is classic. Leukoplakia is unilateral, scrapable? No. White sponge nevus is hereditary and generalized.
A unilocular radiolucency associated with an impacted mandibular third molar, displacing the inferior alveolar canal inferiorly, is most likely: A) Dentigerous cyst B) Odontogenic keratocyst C) Ameloblastoma D) Periapical granuloma Bilateral, lacy (Wickham’s striae) is classic
In a patient with burning mouth syndrome, which lab finding is most relevant? A) Elevated ESR B) Low serum ferritin C) Positive ANA D) High cortisol
Which of the following is a premalignant condition? A) Pyogenic granuloma B) Erythroplakia C) Geographic tongue D) Apthous ulcer displacing the inferior alveolar canal inferiorly
C – Pulp space (air/gutta percha, but air is most radiolucent). Enamel is most radiopaque.