Orthodontic Anchorage
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Questions and Answers

What is the purpose of anchorage units in orthodontics?

  • To apply equal and opposite force to the teeth
  • To support the active component of orthodontic appliances
  • To generate force for tooth movement
  • To provide resistance to unwanted tooth movement (correct)
  • What is the name of the law that states that every action has an equal and opposite reaction?

  • Newton's first law
  • Newton's second law
  • Newton's third law (correct)
  • Newton's law of motion
  • What are the two components of an orthodontic appliance?

  • The intraoral and extraoral components
  • The active and reactive components
  • The anchorage and force components
  • The active and resistance components (correct)
  • What is an example of an extraoral source of anchorage?

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

    What is the term for the units or regions that provide resistance to tooth movement?

    <p>Anchorage units</p> Signup and view all the answers

    What is the purpose of the resistance component in an orthodontic appliance?

    <p>To provide resistance to make the force effective</p> Signup and view all the answers

    What is the primary characteristic of intraoral anchorage?

    <p>Anchor units are present within the oral cavity</p> Signup and view all the answers

    What type of anchorage occurs when elements providing anchorage and those to be moved are situated within the same jaw?

    <p>Intramaxillary anchorage</p> Signup and view all the answers

    How can intraoral anchorage be further divided?

    <p>Into intramaxillary and intermaxillary anchorage</p> Signup and view all the answers

    What type of intraoral anchorage is used when elastic chains are used to retract the anterior segment using the posterior teeth as anchorage units?

    <p>Intramaxillary anchorage</p> Signup and view all the answers

    What is the characteristic of reciprocal anchorage?

    <p>Forces are applied to multiple teeth</p> Signup and view all the answers

    How many subtypes of intramaxillary anchorage are there, depending on the manner of force application?

    <p>3</p> Signup and view all the answers

    In absolute anchorage, what percentage of the extraction space is required for the actual resolution of the malocclusion?

    <p>Less than half</p> Signup and view all the answers

    What type of anchorage allows the anchor teeth to move forward into the extraction space for one fourth to half the total extraction space?

    <p>Moderate anchorage</p> Signup and view all the answers

    In maximum anchorage, what percentage of the extraction space can be lost to the forward movement of the anchor teeth?

    <p>Less than one fourth</p> Signup and view all the answers

    What is the primary goal in maximum anchorage cases?

    <p>To preserve anchorage</p> Signup and view all the answers

    What type of anchorage includes cases where more than half of the extraction space needs to be closed by bringing the anchor teeth forward?

    <p>Minimum anchorage</p> Signup and view all the answers

    What happens to the alveolar bone when forces exceed its resistance?

    <p>It permits tooth movement by bone remodeling</p> Signup and view all the answers

    What is an example of a type of moderate anchorage?

    <p>Nance Button</p> Signup and view all the answers

    What is the role of teeth in orthodontics?

    <p>They are used as anchorage units</p> Signup and view all the answers

    What is one of the factors that determines the anchorage potential of teeth?

    <p>Root form</p> Signup and view all the answers

    What happens to the anchorage of less dense alveolar bone?

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

    What is the result of more mature bone in terms of anchorage?

    <p>It increases anchorage</p> Signup and view all the answers

    What happens to the trabecular pattern within the alveolar bone when forces are applied?

    <p>It becomes rearranged</p> Signup and view all the answers

    What is the primary benefit of using Titanium micro implants in orthodontic treatment?

    <p>To provide absolute anchorage without patient compliance</p> Signup and view all the answers

    What is the shape of the Titanium micro implants used in orthodontic treatment?

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

    What is the primary difference between the self-tapping and self-drilling methods of placing miniscrews?

    <p>Whether a hole is drilled in the cortical bone before placement</p> Signup and view all the answers

    What is the range of lengths of the Titanium micro implants used in orthodontic treatment?

    <p>6 mm to 14 mm</p> Signup and view all the answers

    What are the three components of a Titanium micro implant?

    <p>Endosseous screw section, transmucosal neck, and head</p> Signup and view all the answers

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