A 9-year-old has a persistent daily thumb-sucking habit. Which finding is most likely?

  • Correct answer

    Anterior open bite with proclined maxillary incisors

  • Anterior deep bite with retroclined maxillary incisors

  • Anterior crossbite

  • Class III molar relationship

This question is one of 15 in AFK practice: Orthodontics, pediatric and geriatric dentistry. Test yourself on all of them.

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Explanations

  • A prolonged digit habit typically produces an anterior open bite, flared maxillary incisors, retroclined mandibular incisors and sometimes a posterior crossbite from a narrowed maxilla. Deep bite with retroclined incisors is characteristic of Class II division 2, not digit sucking.

    Source: Proffit, Contemporary Orthodontics — oneguy

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