Space maintenance vs Space regaining Space for unerupted teeth is adequate. However, space will be eventually lost if not maintained vs Space for unerupted teeth is inadequate. Thus, these teeth will erupt into an unsatisfactory alignment if treatment is not initiated
**uses of lingual arch **
- space matineance
- holding E space for crowding
- Increase anchorage for tooth movement
- Retention
- May be used as a frame to solder springs
- Arch development
- you can use the same z spring in a lingual arch to correct the anterior corss bite of a lower incisor
- you can activate the u loops in the back to protrude the lower incisors to get some space
Space Regaining
- Limited to cases where 3-4 mm space has been lost
- Easier in the upper arch than in the lower arch
- You can use an upper removable appliance with or without headgrear
**Thumb Sucking **
- if you stop the habit you usually correct the anterior crossbite but not the posterior one
- this makes maxillary expansion necessary sometimes
Anti-habit appliance
- alginate pick-up impression bands or ss crowns, stone cat with bands/sscs
- Bend 0.8- 1.0mm wire to desired shape and form
- solder two portions of wire together with silver-solder
- solder framework to bands or stainless steel crowns