Orthodontic Anchorage

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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?

Cranium Signup and view all the answers

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

Anchorage units Signup and view all the answers

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

To provide resistance to make the force effective Signup and view all the answers

What is the primary characteristic of intraoral anchorage?

Anchor units are present within the oral cavity 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?

Intramaxillary anchorage Signup and view all the answers

How can intraoral anchorage be further divided?

Into intramaxillary and intermaxillary anchorage 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?

Intramaxillary anchorage Signup and view all the answers

What is the characteristic of reciprocal anchorage?

Forces are applied to multiple teeth Signup and view all the answers

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

3 Signup and view all the answers

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

Less than half 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?

Moderate anchorage 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?

Less than one fourth Signup and view all the answers

What is the primary goal in maximum anchorage cases?

To preserve anchorage 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?

Minimum anchorage Signup and view all the answers

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

It permits tooth movement by bone remodeling Signup and view all the answers

What is an example of a type of moderate anchorage?

Nance Button Signup and view all the answers

What is the role of teeth in orthodontics?

They are used as anchorage units Signup and view all the answers

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

Root form Signup and view all the answers

What happens to the anchorage of less dense alveolar bone?

It decreases Signup and view all the answers

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

It increases anchorage Signup and view all the answers

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

It becomes rearranged Signup and view all the answers

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

To provide absolute anchorage without patient compliance Signup and view all the answers

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

Cylindrical Signup and view all the answers

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

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

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

6 mm to 14 mm Signup and view all the answers

What are the three components of a Titanium micro implant?

Endosseous screw section, transmucosal neck, and head Signup and view all the answers