Effect of experimental bleaching gels with polymers Natrosol and Aristoflex on the enamel surface properties - Gonçalves, Iana Maria Costa; Souza, Danielle Ferreira Sobral; Roveda Junior, Antonio Carlos; Aguiar, Flávio Henrique Baggio; Lima, Débora Alves Nunes Leite (Brazilian Dental Journal, 2023)