Skeletal Class III malocclusion
Conditions
Interventions
Buccal multi-flex spring orthodontic appliance set:Growing children with skeletal Class III malocclusion were treated with a buccal multiloop appliance.
The traction device assembly in front of the mask:Growing children with skeletal Class III malocclusion were treated with a facial mask (maxillary protraction) appliance.
Sponsors
The First Affiliated Hospital of Harbin Medical University
Eligibility
Sex/Gender
All
Age
9 Years to 11 Years
Inclusion criteria
Inclusion criteria: 1. Mixed dentition stage 2. First permanent molars and maxillary central incisors had erupted 3. Aged between 7 and 11 years 4. Anterior crossbite with Class III molar relationship 5. Pretreatment Wits appraisal of -2.0 mm or less
Exclusion criteria
Exclusion criteria: 1. Systemic diseases affecting normal growth and development in children 2. Dental morphological abnormalities 3. Periodontal disease 4. Signs and symptoms of temporomandibular joint disorders
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Upper tooth groove seat point;Sagittal position angles of the maxilla and mandible;The sagittal position distance between the upper and lower jawbones;Mandibular plane Angle;The aesthetic line (E line) is the lower lip distance;Upper middle incisor Angle; | — |
Secondary
| Measure | Time frame |
|---|---|
| Z angle;Lower incisor Angle; | — |
Countries
China
Contacts
Public ContactWang Peijun
The First Affiliated Hospital of Harbin Medical University
Outcome results
None listed