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 (C)</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 (C)</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 (D)</p> Signup and view all the answers

What is the primary characteristic of intraoral anchorage?

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

How can intraoral anchorage be further divided?

<p>Into intramaxillary and intermaxillary anchorage (A)</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 (C)</p> Signup and view all the answers

What is the characteristic of reciprocal anchorage?

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

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

<p>3 (A)</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 (C)</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 (C)</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 (A)</p> Signup and view all the answers

What is the primary goal in maximum anchorage cases?

<p>To preserve anchorage (D)</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 (D)</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 (C)</p> Signup and view all the answers

What is an example of a type of moderate anchorage?

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

What is the role of teeth in orthodontics?

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

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

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

What happens to the anchorage of less dense alveolar bone?

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

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

<p>It increases anchorage (D)</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 (B)</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 (D)</p> Signup and view all the answers

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

<p>Cylindrical (C)</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 (A)</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 (B)</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 (B)</p> Signup and view all the answers

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