Effects of Class III Elastics on Stability of Orthopaedic Class III Correction

NCT04911400 · tracked via the Priya Life Science Australia tracker

Sponsor

Sydney Local Health District

Phase

Not applicable

Started

2020-07-22

Last updated

2026-05-08

Condition(s) studied

Class III MalocclusionUnderbite

Investigational drug(s) / intervention(s)

Upper-lower clear plastic retainers + Class III elasticsUpper-lower clear plastic retainers

Upper-lower clear plastic retainers + Class III elastics: Addition of Class III elastics to clear plastic retainers

Upper-lower clear plastic retainers: Upper-lower clear plastic retainers

Study summary

The purpose of this study is to evaluate the effects of adding elastics to orthodontic retainers on the stability of class III correction and whether it reduces the need for jaw surgery.

Eligibility

Sex

ALL

Min age

12 Years

Max age

16 Years

Healthy volunteers

Accepted

Inclusion Criteria: * Patients that completed their orthodontic treatment for the management of their skeletal class III with upper jaw retrusion that was treated with Class III orthopaedic appliances, followed by full fixed appliances. * No congenital anomalies or craniofacial syndromes * No other orthodontic treatment * No medical history that effects growth Exclusion Criteria: * Congenital anomalies or craniofacial syndromes * Other orthodontic treatment * Medical history that effects growth

Primary outcome measure(s)

Difference in overjet of participants in the 2 study arms — 5 years
Measurement of overjet

Trial sites (2)

Facility	City	Region	Status
Chatswood Orthodontics	Chatswood	New South Wales
Sydney Dental Hospital	Surry Hills	New South Wales

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Official registry record

This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

View NCT04911400 on ClinicalTrials.gov ↗ ← All trials in Australia