Pediatric Dentistry · single question
A child has a 2mm diastema between the upper central incisors. What will MOST LIKELY happen as permanent teeth erupt?
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Correct answer: A. The diastema will spontaneously close as the canines erupt (the 'ugly duckling stage' — normal development)
- A. Correct. A midline diastema between primary/mixed dentition central incisors is NORMAL during the 'UGLY DUCKLING STAGE' (Broadbent phenomenon). As the lateral incisors and canines erupt, the labial forces from these teeth cause the diastema to spontaneously close in most children. Up to 4mm may close naturally without intervention.
- B. Only persistent diastemas after canine eruption require assessment for etiology (thick labial frenum, peg laterals, hypodontia) and possible orthodontic treatment.
- C. Orthodontic intervention is only needed if the diastema persists after all permanent teeth have erupted.
- D. The diastema typically CLOSES, not widens, as permanent teeth erupt.
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