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Class II Division 1 malocclusion — NDEB AFK MCQ

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ModerateOrthodonticsClass II Division 1 malocclusionNDEB AFK

A 10-year-old has increased overjet, competent lips at rest with strain on closure, a convex profile, and a mandibular retrusive pattern. Cephalometric assessment shows increased ANB and normally inclined maxillary incisors. What is the most likely diagnosis?

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Correct answer: D — Skeletal Class II due to mandibular retrusion

The convex profile, increased overjet, increased ANB, and mandibular retrusive pattern point to skeletal Class II primarily from mandibular retrusion. Bimaxillary protrusion would involve protrusive incisors and a different skeletal pattern. The teaching point is to distinguish dental overjet from its skeletal driver before selecting growth modification or camouflage.

Reference: NDEB orthodontic reference texts; NDEB KSAs 2024