Improving breathing in children with orthodontic treatment

Skeletal, Dental and Upper Airway Changes in Skeletal Class II Division 1 Patients With the Constricted Maxilla (8-14 Years Old) Treated With Twin Block and Hyrax, Evaluated Through Pressure Drop Experimental Analysis.

Not applicable Interventional University of Alberta · NCT04190953

This study is testing if certain orthodontic treatments can help children with breathing problems by improving their airway size and making it easier to breathe.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment90 (estimated)
Ages8 Years to 14 Years
SexAll
SponsorUniversity of Alberta Academic / other
Locations1 site (Edmonton, Alberta)
Trial IDNCT04190953 on ClinicalTrials.gov

What this trial studies

This research investigates how orthodontic treatments, specifically mandibular advancement and maxillary expansion, can enhance upper airway volume and reduce respiratory effort in children with class II malocclusion. The study will analyze changes in airway dimensions and airflow resistance using a randomized crossover controlled trial design involving 90 children aged 8-14. Participants will be divided into groups receiving different treatment sequences, and their respiratory capabilities will be assessed using portable polysomnography. The goal is to establish a correlation between orthodontic interventions and improved breathing outcomes.

Who should consider this trial

Good fit: Ideal candidates are children aged 8-14 with skeletal class II division 1 malocclusion and maxillary constriction.

Not a fit: Patients with syndromic conditions, previous orthodontic treatment, or severe oral health issues may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved breathing and reduced respiratory issues in children undergoing orthodontic treatment.

How similar studies have performed: Previous studies have indicated a positive relationship between orthodontic interventions and airway improvements, suggesting this approach has potential based on existing evidence.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* children between the ages 8-14 years old (8-12 years old girls and 9-14 years old boys), presenting skeletal class II division 1 malocclusion with maxillary constriction

Exclusion Criteria:

* syndromic patients, previous ortho history, non-compliance, severe oral health issues (cavities, poor oral hygiene)

Where this trial is running

Edmonton, Alberta

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions ApneaAirway Obstruction, NasalMandible SmallMaxillary Hypoplasia
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.