Type A botulinum toxin application as an alternative for gingival smile correction: A literature review. Research, Society and Development, [S. l.], v. 10, n. 9, p. e21810917930, 2021. DOI: 10.33448/rsd-v10i9.17930. Disponível em: https://rsdjournal.org/rsd/article/view/17930. Acesso em: 5 dec. 2025.