Malocclusion
Conditions
Interventions
TB group (Treatment with a Twin-Block appliance):none
vBHGA group (Treatment with a Van Beek Headgear-Activator appliance):none
Sponsors
Sun Yat-sen University Affiliated Stomatological Hospital
Eligibility
Sex/Gender
All
Age
9 Years to 14 Years
Inclusion criteria
Inclusion criteria: 1) CBCT showed that the cervical spine stage was in CVMS stage II-III (Baccetti cervical staging method), and the dentitudinal was classified as late mixed dentition or early permanent dentition, and the BMI index was in the range of 18-24 (kg/m2); 2) bilateral canines and molars were distal relationship, convex type, and the jaw was retracted;3) Bony class II.: ANB=4°;maxillary basically normal: 78°=SNA=87°;mandibular recession: SNB=78°;4)CBCT The scan shows no distortion or motion artifacts and an appropriate field of view to identify airway structures.
Exclusion criteria
Exclusion criteria: 1) The patient is unable to cooperate with the completion of treatment, 2) history of craniofacial malformation and craniofacial surgery, 3) history of hereditary or systemic diseases, 4) history of tonsillectomy and adenoids, 5) history of respiratory diseases and airway surgery.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Upper airway volume and minimum cross-sectional area; | — |
Secondary
| Measure | Time frame |
|---|---|
| Upper airway morphology; | — |
Countries
China
Contacts
Public ContactJiali Tan
Sun Yat-Sen University/ Sun Yat-sen University Affiliated Stomatological Hospital
Outcome results
None listed