Double Guide Twin Block Orthodontic Functional Appliances ISO13485

What features should all removable appliance have?

- comfort
- cleanable
- adequate retention
- Robust to stand stress of oral function
- not hazard to oral health
- must have a force component and anchorage component

What are the four main components of removable appliances?

Active component
Retention
Anchorage
Base plate or connecting framework

What does the active component of an removable appliance?

Active component is the means by which forces are applied to the teeth to bring the required movement. This can be via springs, bow, and screws

What is the retention component of a removable appliance?

Retention is the means by which appliances resists displacement. This is provided by clasps or cribs and bows.
a) Adams clasps
b) Southend clasps on anterior teeth
c) Labial bow on anterior teeth