Morphologic changes of the frontal and sphenoid sinuses at pharyngeal airway space after orthognathic surgery for class II correction / Alterações morfologicas dos seios frontal e esfenoidal e do espaço aereo faringeo apos cirurgia ortognatica para correção de pacientes classe II

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Orthognathic surgery has been regularly used in the treatment of dentofacial deformities; however, their effects on adjacent structures are not completely clarified. The purpose of this study was to evaluate cephalometrically the morphologic alterations of the frontal and sphenoid sinuses and superior and inferior pharyngeal airway space in class II malocclusion patients, after maxillomandibular advancement. The study included 48 patients (96 lateral teleradiographs) analyzed in the preoperative (1 week before surgery) and postoperative (six months after surgery) periods. In each lateral teleradiography, the linear measurements made were TB-PhW1 (nasopharynx), TU-PhW2 (oropharynx), ANSMe, N-Me and S-Go, the angular measurements were SNA, SNB and gonial, and the dimensions of the frontal and sphenoid sinuses were determined. The results were submitted to Student s t-test to evaluate the differences between the two operative times. The intraclass correlation coefficient (ICC) showed excellent reproducibility (ICC>0.9; p<0.0001) for the measurements. There was an increase in the measurements TB - PhW1 and TU - PhW2 and decrease of the dimensions of the frontal and sphenoid sinuses after orthognathic surgery. In conclusion, the orthognathic surgery consisting of maxillomandibular advancement alters the morphology of the pharyngeal airway space, superior and inferior, and of the frontal and sphenoid sinuses in individuals with class II malocclusion after six months of correction

ASSUNTO(S)

biomechanics biomecanica

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