Active appliances with special screws
Special screw for single derotation.
Special screw - Stainer.
Special screw Beutelspacher enables transverse expansion and protrusive movement of the front teeth in lower jaw.
Special screw Bertoni - three dimensional expansion screw.
Special screw for the closure of diastemas and space closure in lateral region (single movement of the teeth).
Annanced expansion in specific areas.