Angle Class ? malocclusion
Conditions
Interventions
Invisible Mandibular Advancement Appliance Group:None
Bonded Twin-block (TB) Appliance Group for Both Jaws:None
Sponsors
Shanghai Xuhui District Stomatological Hospital(Shanghai Xuhui District Dental Center)
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1.Cervical vertebral maturation stages on lateral cephalograms are classified as CVMI-I (Initiation stage), CVMI-II (Acceleration stage), and CVMI-III (Transition stage); 2.Intraoral manifestation is Class ? dentition pattern: in the late mixed dentition or early permanent dentition stage, the overbite is greater than 5.0 mm, and the maxillary and mandibular canines and molars exhibit at least a cusp-to-cusp relationship; 3.Extraoral manifestations: The maxilla is in a normal position or slightly protruded; the mandible is retrognathic, with a harmonious facial profile after protrusion; no obvious discomfort of the temporomandibular joint is reported; the mouth-opening pattern and mouth-opening degree are basically normal; 4.Skeletal Class ? malocclusion with mandibular retrognathism (ANB angle = 5°, SNB < 78°), accompanied by a low or average mandibular plane angle (FMA <= 32°, SN-MP <= 40°).
Exclusion criteria
Exclusion criteria: 1.A history of orthodontic treatment; 2.A history of supernumerary teeth, congenital tooth agenesis or permanent tooth extraction (excluding third molars); 3.Severe facial asymmetry confirmed by clinical or radiographic examination; 4.Presence of systemic diseases that may affect the outcome of orthodontic treatment.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Cephalometric measurements and CBCT data; | — |
Countries
China
Contacts
Public ContactXue Jiaojiao
Shanghai Xuhui District Stomatological Hospital(Shanghai Xuhui District Dental Center)
Outcome results
None listed