Cephalometric Pattern Classification — NDEB AFK MCQ

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ModerateOrthodonticsCephalometric Pattern ClassificationNDEB AFK

In the cephalometric analysis, a patient with an FMA of 38° and an ANB of 6° would be classified as having which skeletal pattern?

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Correct answer: B — Skeletal Class II with dolichofacial (hyperdivergent/long face) pattern

An ANB of 6° (normal ~2° ± 2°) indicates skeletal Class II relationship (maxilla prognathic relative to mandible or mandible retrognathic relative to maxilla). An FMA of 38° (normal ~25° ± 5°) indicates a hyperdivergent (dolichofacial/long face) pattern with increased lower facial height and steep mandibular plane. This combination (Class II + dolichofacial) is one of the more challenging orthodontic problems because the vertical excess complicates Class II correction — growth modification and orthodontic treatment must avoid worsening the vertical dimension.

Reference: Proffit – Contemporary Orthodontics, 6th ed., 2019