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This study aims to three-dimensionally assess the changes in the airway morphology after anterior segment retraction using maximum anchorage.
Participants were recruited from the Faculty of Dentistry, Beni-Suef University. All subjects were informed of the treatment procedures and signed a consent form.
Methodology:
The patients were treated by using fixed appliance and extraction of four first premolars. Maximum anchorage was obtained by using miniscrews that were inserted between the maxillary first molars and second premolars. En masse retraction of the upper and lower anterior segments was carried out by using NiTi closed coil springs.
Cone beam computed tomography (CBCT) will be obtained before (T0) and after en masse retraction (T1). CBCT will be used for three-dimensional evaluation of the changes of the airway morphology after en masse retraction of the upper and lower anterior segments with maximum anchorage.
The results will be obtained and statistically evaluated.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Bimaxillary protrusion | Experimental | En masse retraction |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Anterior teeth retraction | Other | En masse retraction of the upper and lower anterior segments using maximum anchorage |
|
| Measure | Description | Time Frame |
|---|---|---|
| assess the changes in the airway morphology | measure the airway volume before and after treatment | 6 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Rehab Khalil | Faculty of Dentistry Beni Suef University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Dentistry Beni Suef University | Banī Suwayf | Egypt |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 20677956 | Background | Valiathan M, El H, Hans MG, Palomo MJ. Effects of extraction versus non-extraction treatment on oropharyngeal airway volume. Angle Orthod. 2010 Nov;80(6):1068-74. doi: 10.2319/010810-19.1. | |
| 21793712 | Background | Wang Q, Jia P, Anderson NK, Wang L, Lin J. Changes of pharyngeal airway size and hyoid bone position following orthodontic treatment of Class I bimaxillary protrusion. Angle Orthod. 2012 Jan;82(1):115-21. doi: 10.2319/011011-13.1. Epub 2011 Jul 27. |
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single-arm clinical trial
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| 22462464 | Background | Chen Y, Hong L, Wang CL, Zhang SJ, Cao C, Wei F, Lv T, Zhang F, Liu DX. Effect of large incisor retraction on upper airway morphology in adult bimaxillary protrusion patients. Angle Orthod. 2012 Nov;82(6):964-70. doi: 10.2319/110211-675.1. Epub 2012 Mar 30. |