Specific features of hyoid bone topography in patients with distal occlusion with-in permanent teeth occlusion period

Aim of study: to study the topography of the hyoid bone in adolescents with distal occlusion, while relying on cephalometric analysis of head telerentgenograms (TRG) in the lateral projection. Materials and methods. 68 adolescents aged 15–17 years, who featured a gnathic distal occlusion (the main group) accompanied by sagittal incisive disocclusion (Subgroup 1) and deep incisive disocclusion (Subgroup 2) had the cephalometric analysis of head TRG done in the lateral projection. The comparison group (n=38) were 38 children, comparable in terms of age, and featuring physiological occlusion. The cephalometric analysis performed using the OnDemand3D™ Dental software (CEPH module) employed 11 linear, 10 angular and 2 index values, viewing them as the most significant from the stance of diagnosing distal occlusion. The detection of the hyoid bone topography relied on linear (H-S, H-CIII, H-RGn, H-MP, H-N, H-A, H-B) and angular (