A 2-Year Follow-Up of Changes After Bimaxillary Surgery in Patients With Mandibular Prognathism: 3-Dimensional Analysis of Pharyngeal Airway Volume and Hyoid Bone Position

Shin, Je-Hwa; Kim, Minah; Park, In-Young; Park, Yang-Ho

doi:10.1016/j.joms.2014.10.009

Cited by 41 publications

(30 citation statements)

References 19 publications

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“…It is well-known that the volume of total pharyngeal airway after MSS can be decreased. However, two main perspectives exist on the total volumetric change of the pharyngeal airway after MSS with maxillary advancement: significantly reduced 11–15 and unchanged 16–21 . In terms of changes in the volume of regional PAS, the majority of articles have reported that the volume of the nasopharyngeal airway does not change significantly after two-jaw surgery 14,16,20,21 .…”

Section: Discussionmentioning

confidence: 99%

Silent Changes in Sleep Quality Following Mandibular Setback Surgery in Patients with Skeletal Class III Malocclusion: A Prospective Study

Kim

Cho

et al. 2019

Sci Rep

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Mandibular setback surgery (MSS) for skeletal class III patients can result in a relative reduction of pharyngeal airway space (PAS). Consequently, there is a possibility of the decline of sleep quality after surgery. We investigated changes in sleep quality measured by overnight polysomnography (PSG) and the three-dimensional (3D) volumes of PAS following MSS with or without Le Fort I osteotomy (LF I) in class III patients (N = 53). Overnight PSG and cone beam computed tomography were conducted at preoperative stage (T0) and postoperative 3 months (T1). Measurements of PAS volumes were performed, and the subjective symptoms of sleep were evaluated by self-questionnaires. There were significant increases in respiratory disturbance index (RDI) and total respiratory effort-related arousal (RERA) index during T0-T1. The 3D volumes of PAS showed significant decreases in the oropharyngeal airway, hypopharyngeal airway, and total airway spaces. No significant changes were observed in subjective symptoms of sleep. MSS with or without LF I for class III patients could worsen sleep quality by increasing sleep parameters such as the RDI and RERA in PSG, and reduce volumes of PAS at postoperative 3 months. Although subjective symptoms may not show significant changes, objective sleep quality in PSG might decrease after MSS.

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Section: Discussionmentioning

confidence: 99%

Silent Changes in Sleep Quality Following Mandibular Setback Surgery in Patients with Skeletal Class III Malocclusion: A Prospective Study

Kim

Cho

et al. 2019

Sci Rep

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“…The examinations were obtained at two intervals as part of the surgical protocol: 1‐month preoperatively to assist diagnostics and 3D VSP, and 1‐month postoperatively, to ascertain early surgery outcomes . The patients were instructed to adopt a natural head position (NHP) by looking at their own eyes in a mirror on the opposite wall, with their tongues and lips at rest, breathing lightly and avoiding swallowing during image acquisition . The support for the chin and head was used for the initial positioning but was removed during image acquisition as they could be confused with the soft tissues and negatively affect the VSP .…”

Section: Methodsmentioning

confidence: 99%

Accuracy of 3D virtual surgical planning for maxillary positioning and orientation in orthognathic surgery

Tonin

Filho

Yamashita

et al. 2020

Orthod Craniofacial Res

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Objective This retrospective and observational study evaluated the accuracy of a 3D virtual surgical planning (VSP) for the maxillary positioning and orientation in patients undergoing bimaxillary orthognathic surgery, comparing the planned and postoperative outcomes. Setting and Sample Population Seventy consecutive patients of both sexes, who were submitted to bimaxillary orthognathic surgery between 2015 and 2019 were included in our study. Material and Methods The patients were evaluated by fusing preoperative planning and postoperative outcome using cone‐beam computed tomography scan evaluation. Three‐dimensional VSP and postoperative outcomes were compared by using three linear and three angular measurements. The main outcome interest was the difference between the VSP movement, and the surgical movement obtained. The success criterion adopted was a mean linear difference of <2 mm and a mean angular difference of <4°. Results Results were analysed using a linear mixed model with fixed and random effects, at α = .05. No significant statistical differences were found for linear and angular measurements between the planned and postsurgical outcomes (P > .05). All overlapping points presented values within the range considered clinically irrelevant (<2 mm; <1°). Conclusions Three‐dimensional VSP was executed with a high degree of accuracy. When comparing the planned and postsurgical outcomes, all overlapping points presented values within the range considered clinically irrelevant.

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“…The CBCT scans were performed up to 1 month preoperatively (T 0 ) and 6 1 to 8 8,20 months postoperatively (T 1 ) with the i-CAT Next Generation (Imaging Sciences International, Hatfield, Pa) equipment by a single radiologist. The volumes were acquired with 0.300 mm voxel size, 17 3 23 cm field of view, tube voltage of 120 kVp, and tube current of 3--8 mA.…”

Section: Data Collectionmentioning

confidence: 99%

“…The volumes were acquired with 0.300 mm voxel size, 17 3 23 cm field of view, tube voltage of 120 kVp, and tube current of 3--8 mA. According to a standard protocol, patients remained seated during scanning and were instructed to adopt the natural head position 6,8,10 with the tongue and lips at rest, 10,20 breathing lightly and without swallowing. 2,10,13 The CBCT image files were exported in DICOM (Digital Imaging and Communication in Medicine) format into Dolphin Imaging software version 11.95 (Dolphin Imaging & Management Solutions, Chatsworth, Calif).…”

Section: Data Collectionmentioning

confidence: 99%

How does bimaxillary orthognathic surgery change dimensions of maxillary sinuses and pharyngeal airway space?

Bin¹,

Filho²,

Yamashita³

et al. 2020

The Angle Orthodontist

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Objectives To assess changes in the maxillary sinus (MS) and pharyngeal airway space (PAS) after bimaxillary orthognathic surgery using cone-beam computed tomography (CBCT). Materials and Methods The CBCT scans of 48 patients were divided into two groups: group 1: maxillary advancement and mandibular setback (n = 24); group 2: maxillomandibular advancement (n = 24). The CBCTs were acquired 1 to 2 months preoperatively and 6 to 8 months postoperatively. A kappa test was used to determine intra- and interexaminer agreement. Area, volume, and linear measurements of MSs and PASs obtained before and after surgery were compared using a mixed model (P < .05). Results All variables of the MS showed significant postsurgical reductions in both groups, except the MS length, which showed a significant increase in group 2. Volume and minimum axial area of PAS showed statistically significant postsurgical increases in both groups (P < .05). Conclusions Despite the reduction in the MS and the increase in the PAS, results indicated that the airway was not negatively affected after maxillomandibular advancement and maxillary advancement with mandibular setback.

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A 2-Year Follow-Up of Changes After Bimaxillary Surgery in Patients With Mandibular Prognathism: 3-Dimensional Analysis of Pharyngeal Airway Volume and Hyoid Bone Position

Cited by 41 publications

References 19 publications

Silent Changes in Sleep Quality Following Mandibular Setback Surgery in Patients with Skeletal Class III Malocclusion: A Prospective Study

Silent Changes in Sleep Quality Following Mandibular Setback Surgery in Patients with Skeletal Class III Malocclusion: A Prospective Study

Accuracy of 3D virtual surgical planning for maxillary positioning and orientation in orthognathic surgery

How does bimaxillary orthognathic surgery change dimensions of maxillary sinuses and pharyngeal airway space?

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