Orthodontics · single question
Which myofunctional disorder is most related to the development of malocclusion?
Show answer and explanation
Correct answer: A. Tongue thrust
- A. Correct. Tongue thrust (an oral myofunctional habit) directly produces anterior open bite/proclination.
- B. Mouth breathing is a respiratory pattern (contributes, but is not classified as the myofunctional disorder itself).
- C. Bruxism is a parafunctional grinding habit, not a tongue/lip myofunctional disorder.
- D. Thumb sucking is a digit habit rather than a myofunctional muscular disorder.