Orthodontics · single question

What is the best method to identify Angle's classification of malocclusion clinically?

  1. Extra-oral frontal view
  2. Extra-oral lateral view
  3. Intra-oral lateral view
  4. Intra-oral frontal view
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Correct answer: C. Intra-oral lateral view

  • A. ❌ An extra-oral frontal view shows facial symmetry but not the molar relationship needed for Angle's classification.
  • B. ❌ An extra-oral lateral (profile) view can suggest skeletal class but does not allow direct visual assessment of molar occlusion.
  • C. ✅ Correct. The intra-oral lateral (buccal) view provides direct visualization of the mesiobuccal cusp of the upper first molar relative to the mesiobuccal groove of the lower first molar — the landmark for Angle's classification.
  • D. ❌ An intra-oral frontal view shows the anterior relationship but not the posteroanterior molar relationship clearly.

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