Evaluation of the effect of invisible and fixed appliance treatment on tooth movement

Status

Recruiting

Phases

Phase 4

Study type

Interventional

Source

ChiCTR

Registry ID

ChiCTR2400094809

Enrollment

Unknown

Registered

2024-12-27

Start date

2019-03-01

Completion date

Unknown

Last updated

2025-01-06

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

Conditions

class I malocclusion

Interventions

Group A:Tooth extraction group with invisible orthodontic treatment

Group B:Non-extraction group with invisible orthodontics

Group C:Extraction group with fixed orthodontics

Group D:Non-extraction group with fixed orthodontics

Eligibility

Sex/Gender

All

Age

12 Years to 18 Years

Inclusion criteria

Inclusion criteria: 1.age ranging between 12-18 years; 2.with permanent teeth not missing before treatment (except for third molars); 3.with complete records of pre- and posttreatment; 4.with invisalign or fix treatment; 5.identified as having class I malocclusion.

Exclusion criteria

Exclusion criteria: 1.class II or III malocclusion; 2.incomplete treatment; 3.congenital malformations or periodontal diseases;

Design outcomes

Primary

Measure	Time frame
Discrepancy Index;Objective Grading System;	—

Countries

China

Contacts

Public ContactYu Zhou

School and Hospital of Stomatology, Wenzhou Medical University

zhouyu@wmu.edu.cn+86 577 88855488

Outcome results

None listed

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