Incidence of maxillary sinusitis following Le Fort I osteotomy: clinical, radiographic and endoscopic study - Pereira-Filho, Valfrido Antonio; Gabrielli, Mário Francisco Real; Gabrielli, Marisa Aparecida Cabrini; Rodrigues Junior, Antonio Luiz; Klüppel, Leandro Eduardo; Passeri, Luis Augusto; Pinto, Fernando A. (Journal of Oral and Maxillofacial Surgery, 2011)