Study the Effect of Upper Expansion Appliances on Lower Jaw Forward Projection/Growth (NCT03286569) | Clinical Trial Compass
RecruitingNot Applicable
Study the Effect of Upper Expansion Appliances on Lower Jaw Forward Projection/Growth
Canada60 participantsStarted 2019-04-01
Plain-language summary
Young children with backward positioned lower jaw/chin will be recruited to have an upper jaw expansion appliance. Previous research showed that the use of similar appliances can lead to lower jaw forward growth. 60 young children aged 9-11 will be recruited to have either active or non-active Wilson type upper arch expansion appliance. Patients will have special x-ray (Cone Beam computed tomography) before and after treatment (after 9 months) of starting the treatment. After participation, routine orthodontic treatment will be continued.
Who can participate
Age range
9 Years – 11 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Class II skeletal due to lower jaw backward projection
. Class II malocclusion
. Early mixed dentition (all first permanent molars erupted, as well as all erupting upper and lower permanent incisors)
Exclusion criteria
. Other orthodontic treatment provided
. Growth problems (craniofacial syndromes, etc.)
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1This trial is studying whether upper jaw expansion appliances can actually influence how the lower jaw grows forward — is my child's specific type of excessive horizontal overbite the kind that might respond to this approach, and how would you know?
2Since this trial has no assigned phase, what does that mean for how much is already known about the safety and effectiveness of upper expansion appliances for changing lower jaw growth, compared to more established orthodontic treatments?
3The trial is measuring lower jaw size and projection as its main outcomes — how long would my child need to be in the study before we'd see whether the appliance is having any effect on their jaw growth?
4Would taking part in this trial mean delaying or replacing any standard orthodontic treatment my child might otherwise receive now, and could waiting affect their long-term outcome?
5Are there conventional orthodontic or orthopedic treatments already available that address an excessive horizontal overbite, and how does the approach being studied in this trial compare to what you'd normally recommend?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.