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Aim of the study: is to compare the changes in the sagittal pharyngeal airway dimension (SPAD) and mandibular position before and after the levelling and alignment stage of orthodontic treatment in Class II division 2 patients.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Levelling and alignment | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Orthodontic Treatment | Procedure | All the enrolled patients will undergo conventional fixed appliance therapy by bonding straight wire Roth appliance in the maxillary arch. The bonding procedure will be standardized in all patients and performed by the same operator using light-cured composite. Levelling and alignment will then be started using the following wire sequence: 0.014-in nickel titanium (NiTi), 0.018-in NiTi, 17×25-in Niti, and 19×25-in Niti arch wires. The upper arch will then be stabilized using a 19×25-in stainless steel (SS) arch wire for 2 months. This stage will require approximately 6 months of treatment. |
| Measure | Description | Time Frame |
|---|---|---|
| Changes in the sagittal pharyngeal airway space (SPAD) | 6 months |
| Measure | Description | Time Frame |
|---|---|---|
| Changes in the mandibular position | 6 months | |
| Sagittal skeletal measurements | 6 months | |
| Vertical skeletal measurements |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Farah Y Eid, PhD | Contact | +201001495565 | farahyousry66@gmail.com |
| Name | Affiliation | Role |
|---|---|---|
| Farah Y Eid, PhD | Faculty of Dentistry, Alexandria University, Egypt | Principal Investigator |
| Dina Elfouly, PhD | Faculty of Dentistry, Alexandria University, Egypt | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Dentistry, Alexandria University | Recruiting | Alexandria | Egypt |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 42247179 | Derived | Eid FY, Madian AM, Elfouly D. Changes in the sagittal pharyngeal airway dimension following levelling and alignment in class II division 2 patients: a prospective clinical trial. Clin Oral Investig. 2026 Jun 5;30(6):279. doi: 10.1007/s00784-026-06944-2. |
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| ID | Term |
|---|---|
| D008312 | Malocclusion, Angle Class II |
| ID | Term |
|---|---|
| D008310 | Malocclusion |
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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| ID | Term |
|---|---|
| D009970 | Orthodontics |
| ID | Term |
|---|---|
| D003813 | Dentistry |
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|
| 6 months |
| Ahmed Madian, PhD |
| Faculty of Dentistry, Alexandria University, Egypt |
| Study Chair |