Pediatric Dentistry · single question
Which of the following can occur with the eruption of permanent teeth when a child has a midline diastema?
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Correct answer: A. A diastema less than 2mm will close spontaneously
A physiologic midline diastema (ugly duckling stage) commonly occurs when permanent central incisors erupt before lateral incisors and canines. If the diastema is LESS THAN 2mm, it typically closes spontaneously as lateral incisors and canines erupt and push central incisors mesially. Diastemas GREATER than 2mm are less likely to close and may require orthodontic intervention.
- A. CORRECT. A diastema less than 2mm will typically close spontaneously as lateral incisors and canines erupt, applying mesial force.
- B. Incorrect. A diastema greater than 2mm is LESS likely to close spontaneously.
- C. Incorrect. Not all diastemas require treatment.
- D. Incorrect. Small physiologic diastemas (under 2mm) frequently close spontaneously.
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