Usually employed for children as well as  in preparation for treatment with fixed braces.
There  are active and passive removable braces.
Active  removable  normally consist of a polymer base with clamps and elements for manipulation (expansion screws/ uprighting springs). The clamps serve to fasten the braces to the teeth, the elements of movement distend the jawbone or correct the mal-positioned tooth.

Passive removable use functional or latent body  forces. These apparatus lie loosely in the mouth as they do not have clamps.  They serve to train the musculature.

Manufactoring procedure:

1. Impression of maxilla and mandible
2. Plaster casts
3. Modelling of  basis on the casts
4. Polishing and finishing
5. Fitting in the mouth

Advantages:

• Pain free treatment
• Low caries risk
  
• Treatment can be started in early life (10 – 12 years )
  
• No need to wear at sports or other events
• Short control sessions to activate the moving elements
  

• Not all malocclusions can be corrected with  removable braces, often treatment  must be continued with fixed braces
  
• Motivation of the patient is essential. Removables must be worn for at least 15 hours a day 
  
• The overall duration of treatment is longer than with fixed braces