Three-dimensional alterations in pharyngeal airspace, soft palate, and hyoid bone of class II and class III patients submitted to bimaxillary orthognathic surgery: A retrospective study.

Autor: Souza Pinto GN; Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas, Avenida Limeira, 901-13414-018, Piracicaba, São Paulo, Brazil. Electronic address: nsouzagustavo@gmail.com., Iwaki Filho L; Oral and Maxillofacial Surgery, Department of Dentistry, State University of Maringá, Avenida Mandacaru, 1550-87080-000, Maringá, Paraná, Brazil. Electronic address: liogifilho@gmail.com., Previdelli ITDS; Department of Statistics, State University of Maringá, Avenida Colombo, 5790-87020-900, Maringá, Paraná, Brazil. Electronic address: isoldeprevidelli@gmail.com., Ramos AL; Department of Dentistry, State University of Maringá, Avenida Mandacaru, 1550-87080-000, Maringá, Paraná, Brazil. Electronic address: dradilsonramos@gmail.com., Yamashita AL; Oral Radiology Residency Program, Department of Dentistry, State University of Maringá, Avenida Mandacaru, 1550-87080-000, Maringá, Paraná, Brazil. Electronic address: amandayamashita@gmail.com., Stabile GAV; Oral and Maxillofacial Surgery, Department of Dentistry, State University of Londrina, Rua Pernambuco, 540-86020-120, Londrina, Paraná, Brazil. Electronic address: glaykon.bmf@gmail.com., Stabile CLP; Oral and Maxillofacial Surgery, Department of Dentistry, State University of Londrina, Rua Pernambuco, 540-86020-120, Londrina, Paraná, Brazil. Electronic address: ceciliastabile@gmail.com., Iwaki LCV; Dental Radiology and Stomatology, Department of Dentistry, State University of Maringá, Avenida Mandacaru, 1550-87080-000, Maringá, Paraná, Brazil. Electronic address: lilianiwaki@gmail.com.
Jazyk: angličtina
Zdroj: Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery [J Craniomaxillofac Surg] 2019 Jun; Vol. 47 (6), pp. 883-894. Date of Electronic Publication: 2019 Mar 16.
DOI: 10.1016/j.jcms.2019.03.015
Abstrakt: Introduction: The aim of this retrospective study was to evaluate changes in pharyngeal airway space (PAS), soft palate, and hyoid bone position after bimaxillary orthognathic surgery in skeletal Class II and Class III patients.
Methods: Patients were divided into Group 1: Class III patients who underwent maxillary osteotomies and mandibular setback surgery (N = 43); and Group 2: Class II patients who underwent maxillomandibular advancement surgery (N = 36). Cone beam computed tomography (CBCT) images were acquired one month before and six to eight months after orthognathic surgery. PAS area, volume and minimum axial area (MAA), soft-palate morphology, and hyoid bone position measurements obtained before and after orthognathic surgery were compared using the Gamma family test (p ≤ 0.10).
Results: In Class II group the maxillomandibular advancement surgery significantly increased the PAS area, volume, and MAA and significantly affected hyoid bone position and soft-palate morphology. In Class III group, maxillary osteotomies and mandibular setback also showed increase in PAS area, however without statistically significant values for most of the evaluated measurements.
Conclusion: The results of the present study indicate that PAS and related structures are expected to be improved in Class II patients submitted to bimaxillary surgery, and they are not negatively affected by bimaxillary surgery in Class III patients.
(Copyright © 2019 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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