Watuse de Sousa Miranda1, Vanessa Álvares de Castro Rocha2, Késia Lara Dos Santos Marques1, Antonio Irineu Trindade Neto3, Célio Jesus do Prado4, Darceny Zanetta-Barbosa4. 1. Graduate student, Postgraduate Program in Dentistry, Dental School, Federal University of Uberlândia, Uberlândia, MG, Brazil. 2. Graduate student, Postgraduate Program in Dentistry, Dental School, Federal University of Uberlândia, Uberlândia, MG, Brazil. Electronic address: Vacastro@uol.com.br. 3. Department of Oral and Maxillofacial Surgery, Santa Izabel Hospital, Salvador, BA, Brazil. 4. Postgraduate Program in Dentistry, Dental School, Federal University of Uberlândia, Uberlândia, MG, Brazil.
Abstract
OBJECTIVE: The aim of this study was to assess changes in the superior airway space (SAS) in Class II patients undergoing orthognathic surgery with counterclockwise rotation of the maxillomandibular complex (MMC). STUDY DESIGN: A total of 23 patients (15 females and 8 males; mean age, 33 years) with symptoms of respiratory disease (mouth breathing) were studied. The patients were subjected to computed tomography analyses at two time intervals: T1 (preoperatively) and T2 (postoperative minimum of 6 months). The computed tomography images were exported to Dolphin Imaging 11.5 software to measure the surface area, minimum axial area, and volume of the SAS. RESULTS: The surgery (including a median mandibular advancement of 14 mm with an average rotation of 8 degrees) significantly increased the static SAS, with mean postoperative increases of 178 mm(2) in SA, 76.67 mm(2) in minimum axial area, and 10118.5 mm(3) in volume. A significant increase was also observed in the three-dimensional airspace following orthognathic surgery, which provided a greater permeability of the SAS in Class II patients. CONCLUSIONS: This confirmed the efficacy of this technique in the treatment of respiratory disorders.
OBJECTIVE: The aim of this study was to assess changes in the superior airway space (SAS) in Class II patients undergoing orthognathic surgery with counterclockwise rotation of the maxillomandibular complex (MMC). STUDY DESIGN: A total of 23 patients (15 females and 8 males; mean age, 33 years) with symptoms of respiratory disease (mouth breathing) were studied. The patients were subjected to computed tomography analyses at two time intervals: T1 (preoperatively) and T2 (postoperative minimum of 6 months). The computed tomography images were exported to Dolphin Imaging 11.5 software to measure the surface area, minimum axial area, and volume of the SAS. RESULTS: The surgery (including a median mandibular advancement of 14 mm with an average rotation of 8 degrees) significantly increased the static SAS, with mean postoperative increases of 178 mm(2) in SA, 76.67 mm(2) in minimum axial area, and 10118.5 mm(3) in volume. A significant increase was also observed in the three-dimensional airspace following orthognathic surgery, which provided a greater permeability of the SAS in Class II patients. CONCLUSIONS: This confirmed the efficacy of this technique in the treatment of respiratory disorders.