The effect of augmented corticotomy-assisted en masse retraction in skeletal Class II patients

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Interventional

Source

ChiCTR

Registry ID

ChiCTR2000029564

Enrollment

Unknown

Registered

2020-02-04

Start date

2014-01-01

Completion date

Unknown

Last updated

2020-02-10

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

Conditions

corticotomy

Interventions

Experimental group:corticotomy

control group:no corticotomy

Eligibility

Sex/Gender

All

Age

18 Years to 25 Years

Inclusion criteria

Inclusion criteria: 1. aged 18–25 years; 2. mild-to-moderate skeletal Class II Division 1, ANB 5 to 8 degree; 3. maxillary crowding <=4 mm, requiring extraction of maxillary first premolars; 4. no root resorption of maxillary anterior teeth; 5. no history of trauma and with intact maxillary anterior crowns; 6. no missing, supernumerary, or impacted teeth (except third molars), and no previous orthodontic treatment or maxillofacial surgery.

Exclusion criteria

Exclusion criteria: 1. long-term use of bisphosphonates or NSAIDS, which can slow bone metabolism; 2. bad periodontal health and oral hygiene.

Design outcomes

Primary

Measure	Time frame
root length;alveolar bone thickness;alveolar bone height;time;	—

Countries

China

Contacts

Public ContactChun-Yang Zhao

Affiliated stomatological hospital of Nanjing Medical University

zhaochunyang_orth@163.com+86 13951731232

Outcome results

None listed

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