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Orthodontic Removable Appliances Components

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Orthodontic Removable Appliances Components

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Questions and Answers

What are the components of a removable appliance?

Active components

Retentive components

Base plate

All of the above (correct)

How do removable appliances work?

By pulling the tooth out of its socket

By rotating the tooth around its center of resistance

By applying multiple forces on the crown of the teeth

By tipping the tooth around its apex (correct)

Which component of a removable orthodontic appliance brings about actual tooth movement?

Base plate

Springs

Adam clasp

Labial bows (correct)

What is the purpose of a labial bow in a removable appliance?

To provide retentive function and possibly become an active element Signup and view all the answers

Which direction can tipping be brought about by removable appliances?

Both mesio-distal and bucco-lingual direction Signup and view all the answers

What are the basic parts of a labial bow?

Horizontal curved 'bow' shaped portion, vertical U shaped loops, retentive tags Signup and view all the answers

What is the primary purpose of a short labial bow?

Passive retention of anterior teeth Signup and view all the answers

How is a long labial bow different from a short labial bow?

It extends from first premolar to the contralateral side Signup and view all the answers

What is the activation method for a long labial bow?

Compressing the loop 1-2mm Signup and view all the answers

When is a short labial bow indicated for use?

Minor overjet reduction and anterior space closure Signup and view all the answers

In what cases can a long labial bow be used?

Guidance of canines during retraction Signup and view all the answers

What modification can be made to a long labial bow in extraction cases?

Soldering to the Adams' clasp for space closure Signup and view all the answers

Study Notes

Removable orthodontic appliances consist of a plastic base plate with wires, springs, or screws to hold it in place.
Components of removable appliances include active components, retentive components, and the base plate.
Removable appliances work by applying a single force to the crown of the teeth, tipping the tooth around its center of resistance.
Active components of removable orthodontic appliances include labial bows, springs, expansion screws, and elastics.
Labial bows are curved wire components used for retention, retraction of anterior teeth, and carrying auxiliary springs.

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Description

Learn about the components and action of removable appliances in orthodontics, with a focus on active components, retentive components, and base plate. Understand how removable appliances work by applying a single force to the crown of the teeth.