Journal article

Publication year: 2021

Pages: 146-153

Journal: Journal of Cranio-Maxillofacial Surgery

Volume number: 49

Issue number: 2

ISSN: 1010-5182

eISSN: 1878-4119

DOI Link: https://doi.org/10.1016/j.jcms.2020.12.011

Publisher: Elsevier

Abstract: 

The aim of this study was to evaluate volumetric changes of the posterior airway space (PAS) following bimaxillary surgery using a high oblique sagittal split osteotomy (HSSO) of the mandibular ramus.

The cone beam CTs of Class II and Class III patients taken before (TO) and 6-12 months after surgery (TI) were analyzed using 3D software (Mimics (R) Innovation Suite 18.0). The PAS was divided into three segments (superior, middle, inferior) by three planes parallel to the Frankfurt horizontal plane intersecting at the posterior nasal spine, the velum palatinum and the epiglottis. Total (TPAS) and partial volumes (SPAS = superior, MPAS = middle, IPAS = inferior) were calculated.

For the 25 Class II patients, a highly significant increase (p<0.001) of the total, middle and inferior airway space (TPAS: +33.6%, MPAS: +43.1%, IPAS: +55.9%) was found, while the increase of the upper airway space was statistically not significant (+5.4%, p = 0.074). For the 28 Class III patients, the total, middle and inferior airway space increased statistically insignificantly (TPAS: +4.6%, p = 0.265, MPAS: +2.7%, p = 0.387, IPAS: +2.8%, p = 0.495), while the increase of the upper airway space was statistically significant (+9.7%, p = 0.010).

Bimaxillary orthognathic surgery using the HSSO technique led to a significant increase of PAS for Class II patients and could conserve the PAS for Class III patients. (C) 2021 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

Harvard Citation style: von Bremen, J., Lotz, J., Kater, W., Bock, N. and Ruf, S. (2021) Upper airway changes following high oblique sagittal split osteotomy (HSSO), Journal of Cranio-Maxillofacial Surgery, 49(2), pp. 146-153. https://doi.org/10.1016/j.jcms.2020.12.011

APA Citation style: von Bremen, J., Lotz, J., Kater, W., Bock, N., & Ruf, S. (2021). Upper airway changes following high oblique sagittal split osteotomy (HSSO). Journal of Cranio-Maxillofacial Surgery. 49(2), 146-153. https://doi.org/10.1016/j.jcms.2020.12.011