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Dental Health: Congenital and Environmental Factors
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Dental Health: Congenital and Environmental Factors

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Questions and Answers

What is an example of a congenital defect?

  • Mouth Breathing
  • Cleft lip and palate (correct)
  • Pituitary dwarfism
  • Thumb sucking

    • Which of the following is an environmental etiological factor?

  • Missing teeth
  • Supernumerary teeth
  • Pituitary dwarfism
  • Abnormal pressure habits (correct)

    • What is a possible problem associated with supernumerary teeth?

  • Reduced risk of dental caries
  • Increased spacing between teeth
  • Early eruption of permanent teeth
  • Failure of tooth eruption (correct)

    • What is an example of an abnormal pressure habit?

    <p>Tongue thrust</p> Signup and view all the answers

    What is a possible consequence of a supernumerary tooth?

    <p>Increased dental crowding</p> Signup and view all the answers

    What is a type of supernumerary tooth?

    <p>Mesiodens</p> Signup and view all the answers

    What is the method to substitute a canine for a lateral?

    <p>Palatal root torque and bonding</p> Signup and view all the answers

    What is the recommended inter-radicular distance for implant placement?

    <p>At least 6mm</p> Signup and view all the answers

    What is the treatment option for a fused tooth that involves separating the two teeth?

    <p>Surgical hemisection</p> Signup and view all the answers

    What is the purpose of early extraction of a specific tooth in space closure?

    <p>To encourage canine to erupt in lateral space</p> Signup and view all the answers

    What is the term for the union of two tooth germs?

    <p>Fusion</p> Signup and view all the answers

    What is the recommended retention period for space closure?

    <p>3-6 months</p> Signup and view all the answers

    What is recommended for teeth with evidence of follicular enlargement or cystic formation?

    <p>Remove them</p> Signup and view all the answers

    What is the most common type of tooth absence?

    <p>Hypodontia</p> Signup and view all the answers

    What is the usual order of frequency for tooth absence?

    <p>U2 – L5s – L1s – U5s</p> Signup and view all the answers

    When is it recommended to extract a 2nd molar with poor prognosis?

    <p>When the patient is 7-9 years old</p> Signup and view all the answers

    What is an important consideration when deciding whether to open or close a space for a missing maxillary lateral incisor?

    <p>All of the above</p> Signup and view all the answers

    What type of cases benefit from space closure and canine substitution?

    <p>Class II division 1 with increased overjet</p> Signup and view all the answers

    What is the primary reason to delay extraction of lower 6s?

    <p>To allow for space utilization for crowding and relief of overjet</p> Signup and view all the answers

    What happens if upper 6s are extracted?

    <p>Compensating extraction of lower 6s is avoided</p> Signup and view all the answers

    What is the angle between the long axis of the crypt of L7 and L6?

    <p>Between 15 – 30 degrees</p> Signup and view all the answers

    Why is impaction of lower 8 less likely following extraction of 6s?

    <p>Because the space created allows for easier eruption of lower 8</p> Signup and view all the answers

    What is the direct indication for extraction of 6s?

    <p>In cases of open bite</p> Signup and view all the answers

    What should be extracted instead of healthy premolars if extraction is planned in orthodontic treatment?

    <p>Poor prognosis 6s</p> Signup and view all the answers

    What is a common occurrence in up to 9% of children, often affecting the primary molars?

    <p>Ankylosis and infraocclusion</p> Signup and view all the answers

    What is a feature that can demonstrate a potentially poor prognosis?

    <p>Caries or restoration</p> Signup and view all the answers

    What occurs when there is not enough space available for tooth growth?

    <p>Space regainer is used</p> Signup and view all the answers

    What can occur when a successor tooth is present?

    <p>Mesial drift of the 1st molar</p> Signup and view all the answers

    What is a benefit of having a favorable prognosis?

    <p>Reduced risk of ankylosis</p> Signup and view all the answers

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