Pendulum GNE Distalizer (PhD) according to Hilgers, GrumRax appliance, modified GrumRax appliances
Elements:
RPE screws, sectional screws, bands with palatal/lingual locks, modified extender
Function:
Transversal expansion of the upper jaw & symmetric or asymmetric distal molar movement & rotation of the upper first molars. This can happen simultaneously or consecutively
Description:
The shown modifications of the pendulum appliance are partly designed for activation, to allow a more effective treatment course
A: Pendulum GNE Distalizer (PhD) according to Hilgers For the pendulum GNE Distalizer (PhD) according to Hilgers first the RPE screw is adapted to the palate. The extender is bent to be laid onto the anchorage teeth. Afterwards, Goshgarian locks are soldered underneath the body of the screw in which the pendulum springs with U-loops are engaged.
B: GrumRax appliance according to Grummons The GrumRax appliance is used for arch expansion with simultaneous molar distalisation. The distal extender of the Hyrax® screw is removed and soldered on the anterior extender as occlusal rests on premolars or deciduous molars. Palatal locks for the pendulum springs are soldered onto the screw body.
C: Modified GrumRax appliance To simultaneously rotate the molars, the pendulum spring is fixed laterally on the posterior part of the RPE screw.
