Three-Dimensional Changes in Pharyngeal Airway in Skeletal Class III Patients Undergoing Orthognathic Surgery

Hong, Ji-Suk; Park, Yang-Ho; Kim, Inah; Hong, Seong Uk; Oh, Kyung-Min

doi:10.1016/j.joms.2011.02.011

Cited by 101 publications

(101 citation statements)

References 14 publications

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“…In a few cases, it can be the initiating factor in the development of OSA. Several studies have reported that the setback of the mandible is the sole factor for development of OSA (Riley et al) [1,7]. However, the main disadvantage of these studies is that Endoscopic evaluation (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…As surgery markedly shifts the position of the mandible, large amounts of setback are thought to alter tongue position and narrow the pharyngeal airway space (PAS), potentially causing obstructive sleep apnea (OSA). Also, advancing the mandible markedly would result in more chances of relapse [1]. Numerous studies have been done to study the effect of mandibular orthognathic surgery on the respiration and craniofacial morphology-airway anatomy, nasal flow.…”

Section: Introductionmentioning

confidence: 99%

“…In order to better understand how the airway is affected, it is important to study the size and shape of the airway in both antero-posterior and lateral direction. By measuring the PAS, both in the antero-posterior and lateral dimensions, we can more accurately determine the airway changes following maxillo-mandibular orthognathic procedures [1,2].…”

Section: Introductionmentioning

confidence: 99%

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The “Rubber Band” and “Slingshot” Effects of the Posterior Airway Space in Mandibular Orthognathic Surgeries

Balakrishna

Reddy²,

Kashyap

et al. 2013

J. Maxillofac. Oral Surg.

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Introduction Mandibular surgeries are the most common orthognathic procedures that are undertaken. The pharyngeal airway space (PAS) is influenced by the changes in the sagittal changes of the mandible. Mandibular advancement surgeries are used to an advantage in obstructive sleep apnea cases to improve the airway space. On the contrary, there can be a considerable decrease in the airway space during mandibular setback procedures. Numerous studies have been conducted to study the effect of changes in the PAS during mandibular procedures. However, a combined radiographic and endoscopic analysis of the airway space has been sparsely done in recent literature Materials and methods Thirty-one patients with mandibular discrepancies who needed mandibular surgeries were chosen. The assessment of PAS was done using both lateral cephalograms and endoscopic examination. Results As lateral cephalograms can study only the twodimensional changes in the PAS, endoscopic examination both pre operatively and post operatively enabled the exact assessment of mandibular surgeries on the PAS. The PAS responds to setback mandibular surgery by modifying itself-called the ''Rubber band'' effect and in advancement surgeries as ''Slingshot effect''.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The “Rubber Band” and “Slingshot” Effects of the Posterior Airway Space in Mandibular Orthognathic Surgeries

Balakrishna

Reddy²,

Kashyap

et al. 2013

J. Maxillofac. Oral Surg.

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“…The amount of narrowing of the pharyngeal airway is smaller in patients undergoing bimaxillary surgery than in patients undergoing mandibular setback surgery [58]. Bimaxillary orthognathic surgery for correction of Class III malocclusion caused an increase of the total airway volume and improvement of polysomnography parameters [59].…”

Section: Postoperative Airway Problemmentioning

confidence: 99%

Complications in Orthognathic Surgery

Capone¹,

Sykes²

2012

Complications in Facial Plastic Surgery

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Orthognathic surgery is a common approach for treatment of maxillofacial deformities. Sagittal split ramus osteotomy (SSRO) is one of the most common techniques used to treat various mandibular deformities. A LeFort I osteotomy is suggested in deformities of the maxilla and can be used along with SSRO or intra-oral vertical ramus osteotomy (IVRO).The aim of orthognathic surgery is to improve function and facial appearance; this benefits the patient psychologically and socially. Common complications which may occur in orthognathic surgery include vascular disease, temporomandibular joints (TMJ) problems, nerve damage, infection, bone necrosis, periodontal disease, vision impairment, hearing problems, hair loss, and neuropsychiatric problems. Rarely complications could be fatal. Because of the wide range of complications the surgeon should keep prevention protocols in mind and be prepared to treat them should they occur. In this chapter, common complications of various osteotomies in the mandible and maxilla are discussed.

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“…The airway space presents a frequent modification with orthognathic surgery (Hong et al, 2011) and the management in obstructive sleep apnea (OSA) has been confirmed as an efficient and good cost / effective technique. OSA is characterized by repetitive collapse of the upper airway, commonly defined as the soft tissue region bound by the nasopharynx superiorly, the epiglottis inferiorly, the maxillomandibular complex anteriorly and the spinal column posteriorly.…”

Section: Introductionmentioning

confidence: 99%

Pharyngeal Airway Space in Subjects with Class II and Class III Facial Deformities

et al. 2014

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SUMMARY:Facial deformities are related to morphological differences and the mandible position shows differences in maxillomandible relation. The aim of this research was to compare the pharyngeal airway space (PAS) in subjects with class II and class III facial deformities We included 28 adult subjects with skeletal characteristics associated to class II or class III according to the SNA angle and dental overjet; subjects with facial asymmetry and other facial deformities and subjects with facial trauma or facial surgery history were excluded. Cone beam computed tomography was realized (CBCT) to asses the nasopharynx, oropharynx, hypopharynx, as well as the distance measured between the mandible genial spine and hyoid bone; data analysis were realized by descriptive analysis and statistical analysis using t test with 0.05 to show statistical differences. Class II subjects presented minor values in all of the measurements; in the oropharynx and the hypopharynx we observed the most important differences, with nasopharynx showing statistically significant differences (p<0.05). In conclusion class II subjects presented a minor pharyngeal airway space and it is suggested that this information should be used in the diagnosis process and prior to surgical treatment.

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Three-Dimensional Changes in Pharyngeal Airway in Skeletal Class III Patients Undergoing Orthognathic Surgery

Cited by 101 publications

References 14 publications

The “Rubber Band” and “Slingshot” Effects of the Posterior Airway Space in Mandibular Orthognathic Surgeries

The “Rubber Band” and “Slingshot” Effects of the Posterior Airway Space in Mandibular Orthognathic Surgeries

Complications in Orthognathic Surgery

Pharyngeal Airway Space in Subjects with Class II and Class III Facial Deformities

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