Treatment
orthodontic
ERUPTION
The CHG therapy was started in the EG after the eruption of the first permanent upper molars. The treatment was carried out between time points In the LG, the CHG treatment started 18 months later than in the EG at The intraoral part of the facebow was expanded 5 mm. The long extraoral bow was bent 10 degrees upwards in relation to the intraoral bow. Molar bands with gingival tubes were used. The extraoral force magnitude was 500 g. Patients were instructed to use CHG for 8–10 h/night.The need for further orthodontic treatment was considered individually for each patient after the active treatment phase at 