Direct restorative approach in darkened teeth: literature review. Research, Society and Development, [S. l.], v. 10, n. 15, p. e500101523130, 2021. DOI: 10.33448/rsd-v10i15.23130. Disponível em: https://rsdjournal.org/rsd/article/view/23130. Acesso em: 5 dec. 2025.