Three-Dimensional Evaluation of Pharyngeal Airway and Facial Dimension Changes in Skeletal Class … (NCT06976749) | Clinical Trial Compass
By InvitationNot Applicable
Three-Dimensional Evaluation of Pharyngeal Airway and Facial Dimension Changes in Skeletal Class II Patients Treated With Twin Block Versus Myobrace Appliances
Iraq50 participantsStarted 2025-05-20
Plain-language summary
This study is intended primarily to compare the effects of two Class II correction appliances, namely Twin block and Myobrace appliances, on pharyngeal airway dimensions during the treatment of class II division 1 adolescent patients, also evaluates three dimensional (3D) changes of pharyngeal airway including: minimum cross-sectional area and volume using Cone Beam Computed Tomography (CBCT), skeletal, dentoalveolar, and soft tissue changes using cephalometric analysis, and three dimensional (3D) soft tissue changes using facial scans. The hypothesis being a consideration of no significant difference in the changes of pharyngeal airway and facial dimensions in skeletal class II patients before and after treatment with Twin block and Myobrace.
Who can participate
Age range10 Years – 14 Years
SexALL
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Inclusion criteria
✓. Age: 10-14 years, at growth spurt phase as determined by the cervical vertebrae maturation stage (C3- C4 ) assessed by lateral cephalograms.
✓. Skeletal relationship: skeletal class II (ANB angle \> 4°) with normal maxilla (SNA angle 78°- 84°), and retrognathic mandible (SNB angle \< 77 °).
✓. Dental relationship: Moderate to severe dental class II division 1 malocclusion with overjet 6 -10 mm.
✓. Convex facial profile.
✓. Well aligned/mild crowding (\< 4 mm) of dental arches.
✓. Good to fair oral hygiene status as based on a simplified oral hygiene index (OHI-S).
✓. Normal or decreased lower facial height (SN-MP angle ≤ 32).
Exclusion criteria
✕. Previous orthodontic/orthopedic treatment.
✕. Patients with dental open bite
✕
What they're measuring
1
minimum cross-sectional area of the pharyngeal airway in (mm^2) using Cone Beam Computed Tomography (CBCT)
Timeframe: From enrollment to the end of treatment at 6 months