Herbst appliance with braces
You will find a bunch of different way of herbst appliances.
You can distinguish two main groups of herbst appliances:
- the individual bonded herbst appliance
- the herbst appliance with is attached onto braces (light version)
Whats is the difference between the bonded and the light version of herbst appliance?
Lets start with the light version:
The aim of herbst treatment is to move teeth forward in the mandible and move teeth backward in the upper arch. In the light version herbst attachments are connected to the archwire in the upper and lower jaw. The archwire fits into the bracket slot and transfers the force to the tooth.
Unfortunately there is free play between the ligated arch wire and the bracket slot in the lower incisor teeth, thus the force of the herbst appliance tipps the lower incisal crowns forward as an unintended side effect.
Individual herbst appliance is bonded to the lower arch. As there is no freedome of individual teeth movements, teeth cannot tip foward. One would speak of increasing anchorage in the lower jaw because of bonded herbst applaince. This leads to enhanced distalisation of the upper molars.
To cut a long story short:
using bonded herbst applaince results in a less proklined lower incisor finish, thus leads to a more stabile result in the end of treatment.