Ugly Duckling Stage in Orthodontics
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Questions and Answers

What is the approximate stage of root formation when permanent teeth pierce the gingival margin?

  • Nearly ¾ (correct)
  • Fully formed
  • One half
  • Two thirds
  • Where are the germs of permanent teeth formed in relation to their deciduous predecessors?

  • On the mesial side
  • On the buccal side
  • On the lingual side (correct)
  • On the distal side
  • What happens to a permanent incisor if the deciduous one fails to shed?

  • It erupts in a lingual position (correct)
  • It erupts in a labial position
  • It fails to erupt
  • It erupts in a normal position
  • What happens to the rotation of permanent incisors in a potentially crowded mouth?

    <p>It persists</p> Signup and view all the answers

    Why do permanent incisors rotate before eruption?

    <p>To occupy less space</p> Signup and view all the answers

    Where do premolars migrate to from their lingual position?

    <p>Between the roots of the deciduous molars</p> Signup and view all the answers

    What is the direction of movement of the upper first molar during growth?

    <p>Downwards and forwards</p> Signup and view all the answers

    What occupies the former position of the upper first molar after eruption?

    <p>The second molar</p> Signup and view all the answers

    At what stage of root formation do permanent teeth pass through the crest of the alveolar process?

    <p>When two thirds of the roots are formed</p> Signup and view all the answers

    Why does the tooth tend to move to the line of the dental arch during development?

    <p>To improve its position</p> Signup and view all the answers

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