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Etiological mechanism and functional correction effect of severe bone class II

Comparative study of the efficacy of transparent appliance and Twin Block in the treatment of severe class II bone function

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2200056565
Enrollment
Unknown
Registered
2022-02-08
Start date
2022-02-08
Completion date
Unknown
Last updated
2024-10-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Severe bone class II and airway obstruction

Interventions

Twin block treatment group:None
Clear functional appliance treatment group:None

Sponsors

Stomatological Hospital, Chongqing Medical University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
9 Years to 14 Years

Inclusion criteria

Inclusion criteria: 1. Adolescents with a natural age of 9-14 years who started orthodontic treatment in Wu Xiaomian clinical group in 2015; 2. The peak period of youth development accompanied by severe bone class II; 3. Severe bone class II deformity with anterior teeth irregularities; 4. Severe bony class II deformity with deep overlying anterior teeth lingual tilt; 5. Severe bone class II deformity with snoring; 6. Severe bone class II deformity with sleep disordered breathing; 7. Severe bone class II deformity with malalignment.

Exclusion criteria

Exclusion criteria: 1. Accompanied by severe systemic diseases; 2. Accompanied by mental abnormality; 3. Unable to cooperate with treatment due to academic reasons; 4. Unable to take care of themselves and maintain oral hygiene; 5. Patients unable to return for scheduled visits.

Design outcomes

Primary

MeasureTime frame
Maladjustment of maxilla and mandible;Degree of airway obstruction;

Countries

China

Contacts

Public ContactWu Xiaomian

Stomatological Hospital, Chongqing Medical University

wuxiaomian898@163.com+86 15823166266

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026