Closure of oroantral fistula with the bichat ball. Research, Society and Development, [S. l.], v. 11, n. 12, p. e491111234655, 2022. DOI: 10.33448/rsd-v11i12.34655. Disponível em: https://rsdjournal.org/rsd/article/view/34655. Acesso em: 5 dec. 2025.