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NCT Number: NCT04756843

Early Orthodontic Treatment of Dental Crowding

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.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

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Key information

Conditions

Dental Crowding Behavior Crowding Spatial Behavior

Age range

6 year–14 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of Helsinki

Helsinki, FI-00014, Finland

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Quad-helix

Device

Fixed orthodontic appliance

Primary outcomes

  1. Treatment time

    Time frame: Up to 36 months

    Duration of treatment

Secondary outcomes

  1. Treatment burden

    Time frame: Up to 48 months

    Number of orthodontic appliances used

  2. Alignment of dental arches

    Time frame: up to 48 months

    Occlusal end result of the treatment

Sponsors and collaborators

Lead sponsor

University of Helsinki

Other

Collaborators

  • City of Vantaa

Registry information

Official study title

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

Important dates

Study start
2022
Primary completion
2029
Study completion
2030
First posted
Feb 16, 2021
Registry last updated
Jul 8, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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