orthodontic tooth movement
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. aged 11-18-year-old adolescents with permanent teeth; 2. Maxillary protrusion with a basically symmetrical position of the canines; 3. Reduction 14,24 (except wisdom teeth); 4. mild crowded, crowded degree 4 mm or less; 5. agrees to participate in the trial.
Exclusion criteria
Exclusion criteria: 1. Pregnant or lactating women; 2. Tumors and systemic serious diseases; 3. Oral and maxillofacial acute inflammation and tumor; 4. Severe or progressive periodontal inflammation; 5. in addition to tooth extraction treatment, having other missing teeth; 6. Congenital cleft lip and palate; 7. Asymmetry in facial and dental development; 8. Unwilling or unable to sign informed consent; 9. Change plans during treatment; 10. Failure or inability to complete treatment for some reasons.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| rate of tooth movement;time of the canine retrusion; | — |
Countries
China
Contacts
Peking University, School and Hospital of Stomatology