Orthognathic Surgeries and Pharyngeal Airway Space

Study Overview
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Brief Summary
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twenty-four patients with dentoskeletal deformity of class III will be divided equally into two groups and will be subjected to orthognathic surgeries group A; will be treated by mandibular setback surgery while group B will be treated with bimaxillary orthognathic surgery in the form of mandibular setback and maxillary advancement surgeries. the total pharyngeal airway will be measured on lateral cephalometric radiographs, integrating retro-palatal and retro-glossal area, and statistically will be compared preoperative, immediate postoperative, and at 6 months post-surgically

Official Title
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Malocclusion Patients

Conditions
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Mandibular Prognathism

Intervention / Treatment
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* Procedure: mandibular setback and maxillary advancement
* Procedure: mandibular setback


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: dento-skeletal class III malocclusion which needed a surgical intervention with maxillary advancement surgery and/or mandibular set-back orthognathic surgery in the form of bilateral sagittal split osteotomy no previous orthognathic surgery Exclusion Criteria: Patients with craniofacial syndromes. Medically compromised patients and patients with bone anomalies

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: study arm<br>dento skeletal class III patients will undergo a mandibular setback surgery and maxillary advancement | Procedure: mandibular setback and maxillary advancement<br>* 12 patients will undergo mandibular setback and maxillary advancement<br>|
| Experimental: controlled arm<br>dento skeletal class III patients will undergo a mandibular setback surgery | Procedure: mandibular setback<br>* 12 patients will undergo mandibular setback<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| total pharyngeal airway space surface area | Cephalometric analyses will be performed, the pharyngeal airway is demarcated inferiorly by a line passing through the tip of epiglottis and the superior tip of the hyoid bone, namely Line A, while the retro-glossal and the retro-palatal airway is separated by a line extending from the basion parallel to line A. All the reference points and lines were conveyed to the images . The Pharyngeal airway space was measured and compared. | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Epworth sleepiness scale | (0-24) score to assess sleep apnea indirect | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Orthognathic surgery, Pharyngeal airway space, skeletal class III patients.