Cephalometric evaluation of posterior air space in occlusion Class II patients treated with orthognatic surgery

Valfrido Antonio PEREIRA FILHO, Fabiano JEREMIAS, Lilian TEDESCHI, Raphael Freitas de SOUZA

Aim: Maxillomandibular advancement is a surgical treatment for patients suffering from obstructive sleep apnea syndrome (OSAS) and those with identificable anatomic abnormalities in this complex that narrows and/or obstructs the airway. The purpose of this study is to evaluate pharyngeal airway space cephalometric variations in patients affected by Class II, treated with orthognatic surgery. Methods: The sample consisted of pre and postoperative (minimum 6 months) lateral radiographs of 30 patients, that had undergone mandibular (n=15) and maxillomandibular (n=15) advancement. The cephalometric parameters used allowed to evaluate the posterior airway space at three levels: the hypopharynx (V-LPW), the oropharynx (PAS-MP, PAS-OP, PAS-U and PAS-Up) and the nasopharynx (PAS-NP, pm-UPW). The skeletal analyse was in cranial base (N-S-Ba) and in mandible (Ar-Go-Me). The mean difference between the pre and postoperative linear (mm) and angular (degree) measurements was evaluated by paired t test. Results and Conclusions: Statistically, there was no pharynx airway space reduction after surgery advancement. It was noted that only PAS-OP and pm-UPW remained constant and the values increased, for the most remaining part.

Keywords: Cephalometry. Nasopharyngeal cavity. Class II occlusion. Orthognatic surgery.

Saturday, December 28, 2024 22:46