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Orthodontics · single question

All of the following can cause an anterior open bite EXCEPT:

  1. Microglossia
  2. Macroglossia
  3. Thumb-sucking habit
  4. Anterior tongue thrust
Show answer and explanation

Correct answer: A. Microglossia

  • A. Correct (the exception). Microglossia (an abnormally small tongue) does not push teeth apart and would not cause an open bite.
  • B. Macroglossia (an enlarged tongue) can splay teeth and cause an open bite.
  • C. A persistent thumb/digit-sucking habit is a classic cause of anterior open bite.
  • D. A tongue-thrust swallowing pattern can produce/maintain an anterior open bite.

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