Impacted and Unerupted Teeth Quiz
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Questions and Answers

What defines a tooth as impacted?

  • The normal time for eruption has been exceeded, and the root is completely formed. (correct)
  • The jaw growth and movement of teeth are normal, and there are no abnormal habits.
  • The root is not completely formed, and the homologous tooth has been erupted for at least 6 months.
  • The tooth is in the process of eruption and is likely to erupt based on clinical and radiographic findings.
  • According to the phylogenic theory, what may cause impacted third molar teeth?

  • Delayed extraction of primary teeth leading to overcrowding in the dental arch.
  • Abnormal habits such as thumb-sucking or tongue-thrusting affecting tooth movement.
  • Lack of proper dental hygiene causing obstruction to tooth eruption.
  • Nutritional factors affecting jaw growth, leading to insufficient space for eruption. (correct)
  • What are the systemic causes of unerupted teeth?

  • Hereditary syndrome of Cleidocranial dysostosis. (correct)
  • Genetic variations leading to a small jaw and/or large teeth.
  • Orthodontic factors such as jaw growth and movement of teeth.
  • Early extraction of primary teeth and the role of abnormal habits.
  • According to the Mendelian theory, what role do genetic variations play in impacted teeth?

    <p>Genetic variations can lead to a small jaw from one parent and large teeth from the other, causing impacted teeth due to lack of space.</p> Signup and view all the answers

    What distinguishes an unerupted tooth from an impacted tooth?

    <p>An unerupted tooth is in the process of eruption and likely to erupt based on clinical and radiographic findings, while an impacted tooth has exceeded the normal time for eruption.</p> Signup and view all the answers

    What distinguishes an impacted tooth from an unerupted tooth?

    <p>Homologous tooth has been erupted for at least 6 months</p> Signup and view all the answers

    What causes impacted third molar teeth according to the phylogenic theory?

    <p>Nutrition affecting the growth of the jaw</p> Signup and view all the answers

    What is the role of genetic variations in impacted teeth according to the Mendelian theory?

    <p>Genetic variations play a major role in impacted teeth due to 'lack of space'</p> Signup and view all the answers

    What defines a tooth as impacted?

    <p>The normal time for eruption has been exceeded</p> Signup and view all the answers

    What is the Orthodontic theory's explanation for impacted teeth?

    <p>The growth of the jaw and movement of teeth</p> Signup and view all the answers

    Study Notes

    Impacted Teeth

    • A tooth is defined as impacted when it fails to erupt into the dental arch within the expected time frame or it erupts in an abnormal position.

    Theories of Impacted Teeth

    • The phylogenic theory suggests that impacted third molar teeth are caused by the lack of space in the jaw due to evolution.
    • The Mendelian theory proposes that genetic variations play a significant role in impacted teeth.

    Systemic Causes of Impacted Teeth

    • Systemic causes of unerupted teeth include hormonal disturbances, nutritional deficiencies, and certain systemic diseases.

    Differences between Impacted and Unerupted Teeth

    • An unerupted tooth is a tooth that has not yet erupted into the dental arch but has the potential to do so, whereas an impacted tooth is a tooth that will not erupt due to obstruction or lack of space.
    • The key distinction between impacted and unerupted teeth lies in their potential for eruption.

    Other Theories

    • The Orthodontic theory attributes impacted teeth to the result of abnormal pressure and movement of teeth during orthodontic treatment.

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    Description

    Test your knowledge about impacted and unerupted teeth with this quiz. Learn about the causes, symptoms, and treatment options for these dental conditions.

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