Overbite (Excessive) Horizontal
Conditions
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.
Interventions
DEVICEUpper arch Wilson quadhelex appliance
Upper arch Wilson quadhelex appliance
Sponsors
University of Alberta
Study design
Allocation
RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
9 Years to 11 Years
Healthy volunteers
Yes
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.)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Lower jaw size | 9 months | Lower jaw size will be evaluated by computed tomography. |
| Lower jaw projection | 9 months | Lower jaw projection will be evaluated by computed tomography. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Jaw joint size | 9 months | Jaw joint size will be evaluated by CBCT |
| Base of skull bone size | 9 months | Base of skull bone size will be evaluated by CBCT |
| Base of skull bone position | 9 months | Base of skull bone positions will be evaluated by CBCT |
| Jaw joint position | 9 months | Jaw joint will be evaluated by CBCT |
Countries
Canada
Contacts
Primary ContactDr. Tarek El-Bialy, PhD
Backup ContactRabia Njie, BDS
Outcome results
None listed