Malocclusion
Conditions
Interventions
Observational group:Grouping Strategy:
1. Overcorrection Group Assignment: The degree of overcorrection is calculated using the formula
cases with a correction degree exceeding the threshold are classified as the overcorrection group.
2. Mini-Implant Group Assignment: Patient records are reviewed to determine whether mini-implants wer
Sponsors
West China Hospital of Stomatology, Sichuan University
Eligibility
Sex/Gender
All
Age
18 Years to 40 Years
Inclusion criteria
Inclusion criteria: 1. Permanent dentition?? 2. ??No congenital missing teeth in maxilla (excluding third molars) prior to treatment?? ??3. Treated with clear aligner therapy involving extraction of maxillary bilateral first premolars, without use of sectional arches or extraoral appliances?? 4. ??Complete pre- and post-treatment CBCT and intraoral scan data available
Exclusion criteria
Exclusion criteria: ??1. Non-compliance with aligner wear or elastic use?? ??2. Previous orthodontic treatment history (except early interceptive treatment)?? ??3. Severe oral or systemic diseases?? ??4. Orthodontic-surgical combined cases?
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Tooth movement achievement rate; | — |
Secondary
| Measure | Time frame |
|---|---|
| Roller coaster effect; | — |
Countries
China
Contacts
Public ContactLai Wenli
West China Hospital of Stomatology, Sichuan University
Outcome results
None listed