Orthodontics · single question

Anterior open bite with Class III malocclusion is associated with all of the following habits EXCEPT:

  1. Tongue thrusting
  2. Use of a pacifier
  3. Mouth breathing
  4. Thumb sucking
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Correct answer: B. Use of a pacifier

An anterior open bite with Class III malocclusion characteristics is primarily associated with tongue thrusting (pushes teeth anteriorly and downward), mouth breathing (associated with posterior crossbite, narrow arches, and vertical growth pattern), and digit/thumb sucking (which can cause anterior open bite and excessive overjet). Pacifier use can cause a reversible anterior open bite and spacing between the anterior teeth in young children, but it does NOT cause Class III malocclusion (where the mandible is more prominent than the maxilla). Pacifier-induced open bites typically self-correct after the habit is discontinued, and pacifiers do not cause the skeletal Class III pattern or the tongue posture changes associated with the other habits listed.

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