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

University of Alberta

Status: Enrolling

Conditions: Overbite (Excessive) Horizontal

Treatments: Device: Upper arch Wilson quadhelex appliance

Study type: Interventional

Funder types: Other

Identifiers

NCT03286569

Pro00001731

Details and patient eligibility

About

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.

Full 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.

Enrollment: 60 estimated patients

Sex: All

Ages: 9 to 11 years old

Volunteers: Accepts Healthy Volunteers

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)

Exclusion criteria

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Single Group Assignment

Masking: Double Blind

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60 participants in 2 patient groups, including a placebo group

Active upper Wilson appliance

Active Comparator group

Description:

Active upper arch Wilson quadhelex appliance

Treatment:

Device: Upper arch Wilson quadhelex appliance

Non active upper expansion appliance

Placebo Comparator group

Description:

Non-Active upper arch Wilson quadhelex appliance

Treatment:

Device: Upper arch Wilson quadhelex appliance