Hatem, H., Seif, S., Ahmed, W., Refahee, S. (2021). Effect of Mandibular Set-Back surgery versus Bimaxillary Orthognathic Surgery on pharyngeal airway space and consequent daytime sleepiness in Dento-skeletal class III malocclusion patients.. test, 67(3), 1943-1952. doi: 10.21608/edj.2021.69271.1562
Hussein Hatem; Sameh Seif; Walaa Ahmed; Shaimaa Refahee. "Effect of Mandibular Set-Back surgery versus Bimaxillary Orthognathic Surgery on pharyngeal airway space and consequent daytime sleepiness in Dento-skeletal class III malocclusion patients.". test, 67, 3, 2021, 1943-1952. doi: 10.21608/edj.2021.69271.1562
Hatem, H., Seif, S., Ahmed, W., Refahee, S. (2021). 'Effect of Mandibular Set-Back surgery versus Bimaxillary Orthognathic Surgery on pharyngeal airway space and consequent daytime sleepiness in Dento-skeletal class III malocclusion patients.', test, 67(3), pp. 1943-1952. doi: 10.21608/edj.2021.69271.1562
Hatem, H., Seif, S., Ahmed, W., Refahee, S. Effect of Mandibular Set-Back surgery versus Bimaxillary Orthognathic Surgery on pharyngeal airway space and consequent daytime sleepiness in Dento-skeletal class III malocclusion patients.. test, 2021; 67(3): 1943-1952. doi: 10.21608/edj.2021.69271.1562

Effect of Mandibular Set-Back surgery versus Bimaxillary Orthognathic Surgery on pharyngeal airway space and consequent daytime sleepiness in Dento-skeletal class III malocclusion patients.

Egyptian Dental Journal
Article 6, Volume 67, Issue 3 - Serial Number 2, July 2021, Pages 1943-1952    PDF (1.45 M)
Document Type: Original Article
DOI: 10.21608/edj.2021.69271.1562
Authors
Hussein Hatem* 1; Sameh Seif1; Walaa Ahmed2; Shaimaa Refahee3
1Associate Professor of Oral and Maxillofacial Surgery, Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Cairo University.
2Lecturer of Oral and Maxillofacial Radiology, Oral and Maxillofacial Radiology Department, Faculty Of Dentistry, Cairo University
3Lecturer of Oral and Maxillofacial Surgery, Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Fayoum University
Abstract
Purpose:
Pharyngeal airway space (PAS) assessment after orthognathic surgery is crucial due to the possible resultant breathing hazards. This study compared PAS after mandibular set-back surgery and bimaxillary surgery and its consequent effect on the patients’ daytime sleepiness in class III dento-skeletal patients.
Patients and methods
Twenty-four patients with dento-skeletal class III deformity were divided equally into two groups; group A underwent mandibular set-back surgery while group B had bimaxillary orthognathic surgery through mandibular set-back and maxillary advancement surgeries. PAS area was measured on lateral cephalometric radiographs. Daytime sleepiness was assessed by Epworth sleepiness scale (ESS). All results were recorded pre-surgically, immediate post-surgically and at 6-months post-surgically.
Results
In group A patients, the PAS value at T0 (mean of 546.72±66.61 mm2) revealed a non-significant decrease after mandibular set-back surgery at T1 to reach a mean of 542.89±68.65 mm2, which appeared to minimally relapse at T2 to a value still less than T0 (544.00±68.62 mm2) with a final decreased PAS value. In group B patients, the PAS value (mean of 555.05±75.04 mm2) revealed a non-significant increase after bimaxillary surgery at T1 reaching a mean of 555.73±79.34 mm2 which re-increased at T2 to a mean value of 557.79±78.23 mm2. Following the pattern of PAS, the ESS recorded non-significant changes in both groups from the preoperative values to values at T1 and T2.
Conclusion
Despite of the resulted post-surgical different changes, orthognathic surgery appeared to have no significant effect on PAS area nor on daytime sleepiness in a six-month duration.
Keywords
Keywords: Orthognathic surgery; Pharyngeal airway space; skeletal class III patients; Epworth sleepiness scale; daytime sleep level
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