Three-Dimensional Evaluation of Pharyngeal Airway and Facial Dimension Changes in Skeletal Class II Patients Treated With Twin Block Versus Myobrace Appliances

Launched by UNIVERSITY OF BAGHDAD · May 13, 2025

Keywords

ClinConnect Summary

This study is a multicenter randomized comparative clinical trial, employing non-stratified randomization in two-parallel arms with equal allocation ratio of 1:1. Patients will be recruited from Orthodontic Clinic at the College of Dentistry, University of Kufa, and from specialized dental centers affiliated to the Iraqi Ministry of Health, in addition to some private clinics. Initially, the patients will be assessed for eligibility to participate in the study according to the inclusion criteria. Then, the parents will be informed verbally about the purpose of the study and will be provided...

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • 1. Age: 10-14 years, at growth spurt phase as determined by the cervical vertebrae maturation stage (C3- C4 ) assessed by lateral cephalograms.
• • 2. Skeletal relationship: skeletal class II (ANB angle \> 4°) with normal maxilla (SNA angle 78°- 84°), and retrognathic mandible (SNB angle \< 77 °).
• • 3. Dental relationship: Moderate to severe dental class II division 1 malocclusion with overjet 6 -10 mm.
• • 4. Convex facial profile.
• • 5. Well aligned/mild crowding (\< 4 mm) of dental arches.
• • 6. Good to fair oral hygiene status as based on a simplified oral hygiene index (OHI-S).
• • 7. Normal or decreased lower facial height (SN-MP angle ≤ 32).
• Exclusion Criteria:
• • 1. Previous orthodontic/orthopedic treatment.
• • 2. Patients with dental open bite
• • 3. Patients with obvious facial asymmetry.
• • 4. Patients with orofacial cleft.
• • 5. Previous extractions.
• • 6. Presence of mandibular shifts.