Analyse the impact Twin block appliance and Motion on Hyoid Bone

Patients were selected, divided en two homogenous groups and underwent preoperative and postoperative lateral teleradiograph scans. The datasets were subsequently uploaded into a digital treatment planning software to record the position changes of the hyoid bone at horizontal, vertical, angular, and airway complex level; additionally, the effect of gender, age at onset, treatment time, biotype, and their interactions with the group, have been also statistically evaluated.

Inclusion Criteria:

• 10 and 16 years old, with sketelal class II, a ANB angle ≥4° according to the Steiner cephalometric analysis, with Twin block or Motion appliance

Exclusion Criteria:

• without previous orthodontic treatment, without systemic disesases and adenotonsillar hypertrophy.

Children bewten 10-16 years old