Implications of anatomical variation of the sphenoid sinus for orthognathic surgery: a case report in cone beam computed tomography - Ferlin, Rafaela; Pagin, Otávio; Pagin, Bruna Stuchi Centurion; Mello, Marina de Almeida Barbosa; Yaedú, Renato Yassutaka Faria (RGO- Revista Gaúcha de Odontologia, 2023)