Study the Effect of Upper Expansion Appliances on Lower Jaw Forward Projection/Growth

Not Applicable

Recruiting

• Conditions: Overbite (Excessive) Horizontal
• Interventions: Device: Upper arch Wilson quadhelex appliance

• Registration Number: NCT03286569
• Lead Sponsor: University of Alberta

Brief 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.

Detailed Description

Previous research showed that the use of upper jaw expansion appliances can lead to lower jaw forward growth (1). 60 young children aged 9-11 with backward positioned lower jaw/chin 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.

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study First Submitted: 2015-04-12
• Study First Submitted QC: 2017-09-13
• Study First Posted: 2017-09-18
• Study Start: 2019-04-01
• Status Verified: 2024-11
• Last Update Submitted: 2024-11-03
• Last Update Posted: 2024-11-05
• Primary Completion: 2026-02-01
• Study Completion: 2026-02-01

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

1. Class II skeletal due to lower jaw backward projection
2. Class II malocclusion
3. Early mixed dentition (all first permanent molars erupted, as well as all erupting upper and lower permanent incisors)

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Exclusion Criteria

1. Other orthodontic treatment provided
2. Growth problems (craniofacial syndromes, etc.)

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Active upper Wilson appliance	Upper arch Wilson quadhelex appliance	Active upper arch Wilson quadhelex appliance
Non active upper expansion appliance	Upper arch Wilson quadhelex appliance	Non-Active upper arch Wilson quadhelex appliance

Primary Outcome Measures

Name	Time	Method
Lower jaw projection	9 months	Lower jaw projection will be evaluated by computed tomography.
Lower jaw size	9 months	Lower jaw size will be evaluated by computed tomography.

Secondary Outcome Measures

Name	Time	Method
Base of skull bone position	9 months	Base of skull bone positions will be evaluated by CBCT
Jaw joint size	9 months	Jaw joint size will be evaluated by CBCT
Jaw joint position	9 months	Jaw joint will be evaluated by CBCT
Base of skull bone size	9 months	Base of skull bone size will be evaluated by CBCT

Trial Locations

Locations (1)

University of Alberta; 🇨🇦 Edmonton, Alberta, Canada