Ortho - Lecture 12: Removable and Fixed Appliances Flashcards
Active or passive removable appliance?
Does not move any teeth or bone
Passive
Active or passive removable appliance?
Prevents tooth movement (aka retainers)
Passive
Active or passive removable appliance?
Moves teeth, basal bone, or dento-alveolar base
Active
Active or passive removable appliance?
Causes tooth movement or modifies/guides growth
Active
What are the 3 types of active removable appliances?
Functional
Active plates for tooth movement
Clear aligner therapy
Which active removable appliance?
For growth guidance
Used in adolescents, less frequently in children
Functional
Which active removable appliance?
For expansion or minor tooth movements
Used in preadolescents, adolescents and occasionally adults
Active plates for tooth movement
Which active removable appliance?
“Invisalign”
Primarily adults, occasionally teens
Clear aligner therapy
Which active removable appliance?
Goals:
Position jaws or soft tissue
Guide growth DURING growth spurt
Use growth for Class II or Class III correction
Functional
Which active removable appliance?
Bionator
Frankel
Twin block
Functional
Which active removable appliance?
Goals:
Move teeth within bone
Expanders to open palatal suture
Create mostly tipping motion for minor tooth movements
Active plate
Which active removable appliance?
Expander
Spring aligner
Retainer w/ finger springs
Active plate
Which active removable appliance?
Goals:
Provide Esthetic alternative to braces
Attachments are needed for complex tooth movements
Sequence of trays that move teeth 0.25mm/wk
Clear aligner therapy
Which active removable appliance?
Great for orthodontic relapse
Main movement is tipping of teeth
Class I with mild spacing or crowding
Usually need to do some interproximal reduction
Require buttons on teeth for complex movements
Occasionally use fixed appliance to finish
Clear aligner therapy
What are the 3 types of passive removable appliances?
Retainers
Removable space maintainers
Removable habit appliances (not recommended)
What are the 2 types of retainers?
Hawley
Essix
Which part of Hawley?
Allows posterior tooth eruption by only allowing anterior occlusion; for deep bite
Anterior bite plates
Which part of Hawley?
Prevents posterior tooth eruption by invading leeway space; for open bite
Posterior bite plates
Which appliance?
Rectangular wire in a rectangular slot
Used to need to bend wire for each tooth (all brackets were the same, but all teeth are not the same)
Edgewise appliance
What are the types of bends for edgewise appliances?
1st order: in-out
2nd order: mesial-distal “tip”
3rd order: facio-lingual “torque”
What are the most common bracket prescriptions?
MBT and Roth
