The effect of curve of Spee leveling on skeletal class II growing patient in terms of mandibular position and movement

Skeletal and dentoalveolar changes after lower posterior teeth extrusion in Class II division 1 deep-bite short-faced growing patients

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

TCTR

Registry ID

TCTR20181220007

Enrollment

Registered

2018-12-20

Start date

2017-02-01

Completion date

Unknown

Last updated

2026-08-03

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

Conditions

Patient who have the depth of the curve of Spee more than 2 mm. Class II malocclusion Curve of Spee

Interventions

Curve of Spee leveling,Untreated control

The curve of Spee was leveled by rectangular wire and posterior vertical elastic. ,Growth observation from retrospective records

Experimental Procedure/Surgery,No Intervention No treatment

Eligibility

Sex/Gender

All

Age

11 Years to 14 Years

Inclusion criteria

Inclusion criteria: -Skeletal Class II relationship -Dental Class II relationship -The depth of curve of Spee more than 2 mm -Growing patient -No previous history of orthodontic treatment.

Exclusion criteria

Exclusion criteria: Patients with craniofacial disorders, skeletal asymmetry, dysfunctional disorders of the masticatory system or temporomandibular joint, or presented with abnormal oral habits.

Design outcomes

Primary

Measure	Time frame
Dental change Initial (T0) and after the curve of Spee was flattened (T1) millimeters and degrees; Lateral cephalogram	—

Secondary

Measure	Time frame
Skeletal change Initial (T0) and after the curve of Spee was flattened (T1) millimeters and degrees; Lateral cephalogram	—

Countries

Thailand

Contacts

Public ContactPornpan Jariyavithayakul

Faculty of Dentistry, Prince of Songkla University

tata.as.sun@gmail.com0890661448

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026