Removable And Fixed Appliances : The Basics (Resident) Flashcards
Removable appliances advantages
Fabricated in lab, decreases dentist chair time
Removable and almost invisible
Removable appliances disadvantages
Depend heavily on patient compliance
Had to obtain 2 point contact for complex tooth movement
Types of removable appliances
Passive
Active
Appliance that does not move any teeth or bone, prevents tooth movement, AKA retainers
Passive removable appliance
Appliance that is made to move teeth, basal bone or dento- alveolar base, causes tooth movement or modifies/guides growth
Active removable appliance
What country focused more on fixed appliances
USA
Edward angle
Focused on precise tooth positioning
Which country focused more on removable appliances
Europe
Social welfare system
Limited ortho tx
Precious metals less available
Crozat appliance
George Croazat- early 1900s
Clasps for first molar
Heavy gold wires for framework
Light finger springs
Types of active removable appliances
Functional appliances
Active plates for tooth movement
Clear aligned therapy
Functional appliances
For growth guidance
Adolescents, less in children
Active plates for tooth movement
Expansion or minor tooth movements
Preadolescents, adolescents and occasionally adults
Clear aligner therapy (CAT)
Invisalign
Adults, some teens
Types of functional appliances
Bionator
Frankel
Twin block
Goals of functional appliances
Position jaws or soft tissue
Guide growth during growth spurt
Use growth for Class II or Class III correction
Types of Active plate appliances
Expander
Spring aligner
Retainer with finger springs
Goals of active plate appliances
Move teeth within bone
Expanders to open palatal suture
Create mostly tipping motion for minor tooth movements
Types of clear aligner therapy
Invisalign
Clear correct
Sure smile elemetrix
MTM clear aligner (dentsply)
Goals of CAT
Provide esthetic alternative to braces
Attachments are needed for complex tooth movements
Sequence of tray that move teeth 0.25 mm / week
What is great for ortho relapse, the main movement is tipping of teeth, Class I with mild spacing or crowding, usually needs some interproximal reduction, requires buttons for complex movement and is occasionally used for fix appliance to finish
CAT
Types of passive removable appliances
Retainers
Removable space maintainers
Removable habit appliances (not recommended)
Two types of retainers
Hawley
Essex
Hawley retainers
Can add elements that help to retain your treatment
Anterior bite plates
Posterior bite plates
Anterior bite plates
Allows posterior tooth eruption by only allowing anterior occlusion
For deep bite
Posterior bite plates
Prevents posterior tooth eruption by invading the leeway space
For open bite
