12 Questions
What are the components of a removable appliance?
All of the above
How do removable appliances work?
By tipping the tooth around its apex
Which component of a removable orthodontic appliance brings about actual tooth movement?
Labial bows
What is the purpose of a labial bow in a removable appliance?
To provide retentive function and possibly become an active element
Which direction can tipping be brought about by removable appliances?
Both mesio-distal and bucco-lingual direction
What are the basic parts of a labial bow?
Horizontal curved 'bow' shaped portion, vertical U shaped loops, retentive tags
What is the primary purpose of a short labial bow?
Passive retention of anterior teeth
How is a long labial bow different from a short labial bow?
It extends from first premolar to the contralateral side
What is the activation method for a long labial bow?
Compressing the loop 1-2mm
When is a short labial bow indicated for use?
Minor overjet reduction and anterior space closure
In what cases can a long labial bow be used?
Guidance of canines during retraction
What modification can be made to a long labial bow in extraction cases?
Soldering to the Adams' clasp for space closure
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.
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.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
