Orthodontics · single question

Orthodontic case: maxillary central incisors flared forward, maxillary lateral incisors erupted palatally, maxillary canines erupted high buccally, mandibular hypodontia (1-2 incisors), molar occlusion in neutro-occlusion (Class I). What malocclusion does this patient have?

  1. Class I
  2. Class III
  3. Class II Division 2
  4. Class II Division 1
Show answer and explanation

Correct answer: D. Class II Division 1

  • A. While the molar relationship itself is Class I (neutro-occlusion), the overall described incisor flaring/protrusion pattern is classified by the incisor relationship as Class II Division 1, a key distinction in orthodontic classification (molar relationship vs. overall malocclusion descriptor based on incisor position can differ).
  • B. Class III is characterized by mandibular prognathism/anterior crossbite tendency, inconsistent with the protrusive maxillary incisor pattern described.
  • C. Class II Division 2 features retroclined (upright/lingually inclined), not flared, maxillary central incisors — the opposite of this case's description.
  • D. Correct, per the source material. Despite a Class I molar relationship, the overall malocclusion is classified as Class II Division 1 based on the flared/protrusive incisor relationship described.

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