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Study for comparing Twin Block versus A6 in the treatment of teenagers with class II mallocclusion

Study for comparing Twin Block versus A6 in the treatment of teenagers with class II mallocclusion

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR1900020507
Enrollment
Unknown
Registered
2019-01-03
Start date
2019-01-10
Completion date
Unknown
Last updated
2019-01-14

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

Conditions

class II mallocclusion

Interventions

Two groups:A6 versus Twin block

Sponsors

West China Hospital of Stomatology Sichuan University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
8 Years to 15 Years

Inclusion criteria

Inclusion criteria: (1) class II malocclusion, overjet>5mm; (2) ANB>4 degree, SNB<78 degree; (3) convex provile; (4) average growth pattern'; (5) crowding<4mm; (6) before or during growth peak.

Exclusion criteria

Exclusion criteria: (1) prior orthodontic treatment; (2) extration; (3) use mini-implant; (4) Chronic rhinitis, tonsil hypertrophy and other upper airway diseases.

Design outcomes

Primary

MeasureTime frame
skeletal;dental;soft tissue;the upper airway;—

Countries

China

Contacts

Public ContactZhao Zhihe

West China Hospital of Stomatology Sichuan University West China Hospital of Stomatology Sichuan University

zhzhao@scu.edu.cn+86 13981881666

Outcome results

None listed

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