Changes in the pharyngeal airway after different orthognathic procedures for correction of class III dysplasia
Khaghaninejad Mohammad Saleh, Khojastehpour Leila, Danesteh Hossein, Changizi Mehdi, Ahrari Farzaneh,
소속 상세정보
( Khaghaninejad Mohammad Saleh ) - Shiraz University of Medical Sciences School of Dentistry Department of Oral and Maxillofacial Surgery
( Khojastehpour Leila ) - Shiraz University of Medical Sciences School of Dentistry Department of Oral and Maxillofacial Radiology
( Danesteh Hossein ) - Shiraz University of Medical Sciences School of Dentistry Department of Oral and Maxillofacial Surgery
( Changizi Mehdi ) - Shiraz University of Medical Sciences Department of Oral and Maxillofacial Surgery
( Ahrari Farzaneh ) - Mashhad University of Medical Sciences School of Dentistry Dental Research Center
Abstract
Objective: This study was conducted to compare changes in pharyngeal airway after different orthognathic procedures in subjects with class III deformity.
Methods: The study included CBCT scans of 48 skeletal class III patients (29 females and 19 males, mean age 23.50 years) who underwent orthognathic surgery in conjunction with orthodontic treatment. The participants were divided into three groups of 16, as follows: Group 1, mandibular setback surgery; group 2, combined mandibular setback and maxillary advancement surgery; and group 3, maxillary advancement surgery. CBCT images were taken 1 day before surgery (T0), 1 day (T1), and 6 months (T2) later. The dimensions of the velopharynx, oropharynx, and hypopharynx were measured in CBCT images.
Results: In all groups, there was a significant decrease in airway variables immediately after surgery, with a significant reversal 6 months later (P?
Conclusions: The mandibular setback procedure caused the greatest reduction in the pharyngeal airway, followed by the bimaxillary surgery and maxillary advancement groups, with the latter exhibiting an actual increase in the pharyngeal airway dimensions. It is recommended to prefer a two-jaw operation instead of a mandibular setback alone for correction of the prognathic mandible in subjects with predisposing factors to the development of sleep-disordered breathing.
키워드
Orthognathic surgery; Pharyngeal airway; Class III malocclusion; Oropharynx; Airway obstruction; Maxillary advancement; Mandibular setback; Bimaxillary surgery; Airway resistance; CBCT
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