Early Orthodontic Treatment of Dental Crowding

Early Versus Late Orthodontic Treatment of Dental Crowding - a Randomised Controlled Trial

Status

Active, not recruiting

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT04756843

Enrollment

Registered

2021-02-16

Start date

2022-11-18

Completion date

2030-01-31

Last updated

2025-07-08

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

Conditions

Dental Crowding

Brief summary

Aim of the study is to compare treatment duration and effects of orthodontic treatment of dental crowding between treatments started at different stages of mixed dentition phase. The randomized controlled trial study will be conducted in a public health care center.

Interventions

DEVICEQuad-helix

Fixed orthodontic appliance

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

6 Years to 14 Years

Healthy volunteers

Inclusion criteria

* Dental developmental stage of mixed dentition * Crowding on both dental arches * Skeletal discrepancy not suspected

Exclusion criteria

* National criteria for publicly funded treatment not met by the severity of the malocclusion * Other malocclusions * Angle Class III relationship of the molars * Malocclusion related to a syndrome * Non-compliance to orthodontic treatment

Design outcomes

Primary

Measure	Time frame	Description
Treatment time	Up to 36 months	Duration of treatment

Secondary

Measure	Time frame	Description
Treatment burden	Up to 48 months	Number of orthodontic appliances used
Alignment of dental arches	up to 48 months	Occlusal end result of the treatment

Countries

Finland

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026