Malocclusion
Conditions
Interventions
Adolescents with skeletal Class II mandibular retrognathism:None
People with normal Class I skeletal occlusion:None
Sponsors
Weifang People's Hospital
Eligibility
Sex/Gender
All
Age
7 Years to 14 Years
Inclusion criteria
Inclusion criteria: Inclusion Criteria Experimental Group (Skeletal Class II) Lateral cephalometric radiograph shows: 1. Cervical vertebral maturation assessed by modified method indicates CS2~3 stage. 2. ANB >= 5° (Skeletal Class II), BMI 18.5-24 kg/m^². 3. Coben analysis shows mandibular retrognathia. Clinical indicators: 1. No systemic or genetic diseases affecting craniofacial development. 2. No prior orthodontic treatment history. 3. No obvious symptoms of temporomandibular joint disorders (pain, clicking, limited mouth opening). For the control group, aside from 1° <= ANB <= 5° (Skeletal Class I), all other criteria are the same as the experimental group.
Exclusion criteria
Exclusion criteria: 1. The improved cervical vertebra bone age shows an inappropriate age. It does not meet the criteria for skeletal Class II malocclusion and there are other severe maxillofacial disorders.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| ANB; | — |
Countries
China
Contacts
Public ContactFanghong Yang
Weifang People's Hospital
Outcome results
None listed