ANB Angle — NDEB AFK MCQ
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Correct answer: C — ANB angle
The ANB angle (Point A to Nasion to Point B) indicates the anteroposterior (sagittal) skeletal relationship between the maxilla (Point A) and mandible (Point B) relative to the anterior cranial base (Nasion). Normal ANB is approximately 2° (±2°). ANB > 4° suggests skeletal Class II (maxillary protrusion/mandibular retrusion). ANB < 0° suggests skeletal Class III (maxillary retrusion/mandibular protrusion). ANB = SNA - SNB.
Reference: Proffit – Contemporary Orthodontics, 6th ed., 2019