malocclusion
Conditions
Interventions
experimental group1:Vertical control + adduction of anterior teeth
control group:None
experimental group2:Adduction of anterior teeth
Sponsors
Shanghai Stomatological Hospital, Affiliated Stomatological Hospital of Fudan University
Eligibility
Sex/Gender
Female
Age
18 Years to 35 Years
Inclusion criteria
Inclusion criteria: 1. An's class II class 1 malocclusion (ANB angle>4.7°), crowding degree less than or equal to 4mm, high angle, vertical growth type; 2. The permanent teeth are fully erupted and develop normally, without congenital missing teeth and supernumerary teeth, without impacted teeth and abnormal tooth morphology (except third molars), and without crown restorations; 3. Good oral hygiene, no obvious tooth or periodontal disease; 4. No obvious abnormality in oral soft tissue (lipolingual frenulum, mucous membrane and tongue, etc.); 5. No history of temporomandibular joint disease, trauma, cleft lip and palate, obvious facial asymmetry and other deformities, no history of orthodontics and orthognathic surgery; 6. Normal body mass index (BMI) (women: 19-24kg/m^2).
Exclusion criteria
Exclusion criteria: 1. Craniomaxillofacial deformities; 2. Suffering from nasopharyngeal disease; 3. History of adenoid and tonsillectomy; 4. Has snoring symptoms or has been diagnosed with sleep apnea syndrome.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Anteroposterior length; | — |
Secondary
| Measure | Time frame |
|---|---|
| Displacement of central incisor crown edge;Displacement of central incisor root apical;Mandibular plane angle;Largest transverse width;Volume, mean cross-sectional area of nasopharynx, oropharynx, hypopharyngeal site;Minimum cross-sectional area of nasopharynx, oropharynx, hypopharynx;Horizontal displacement of hyoid bone;Vertical displacement of hyoid bone; | — |
Countries
China
Contacts
Public ContactChen Jing
Shanghai Stomatological Hospital, Affiliated Stomatological Hospital of Fudan University
Outcome results
None listed