Radiographic alterations of the frontal sinus morphology according to variations of the vertical angle in posteroanterior radiographs of the skull . Acta Scientiarum. Health Sciences, [S. l.], v. 36, n. 1, p. 113–117, 2014. DOI: 10.4025/actascihealthsci.v36i1.20243. Disponível em: https://www.periodicos.uem.br/ojs/index.php/ActaSciHealthSci/article/view/20243. Acesso em: 29 maio. 2026.