Violet LED with low concentration carbamide peroxide for dental bleaching: a case report - Rastelli, Alessandra Nara de Souza; Dias, Hércules Bezerra; Carrera, Emanuelle Teixeira; Barros, Ana Cláudia Pedroso de; Santos, Diego Dantas Lopes dos Vitor Hugo Panhóca; Panhóca, Vitor Hugo; Bagnato, Vanderlei Salvador (Photodiagnosis and Photodynamic Therapy, 2018)