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Orthodontics · single question

Angle's Class III is defined as:

  1. The mesiobuccal cusp of the maxillary 1st molar occludes DISTAL to the mesiobuccal groove of the mandibular 1st molar
  2. MB cusp occludes IN the mesiobuccal groove
  3. MB cusp occludes MESIAL to the groove
Show answer and explanation

Correct answer: A. The mesiobuccal cusp of the maxillary 1st molar occludes DISTAL to the mesiobuccal groove of the mandibular 1st molar

Class III: maxillary 1st molar MB cusp is distal to the mandibular MB groove.
  • A. Correct. In Class III the maxillary molar sits distal to the groove (mandible is positioned forward).
  • B. That is Class I.
  • C. That is Class II.

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