Retention evaluation of two glass ionomer cement sealants: sixmonth clinical follow-up - Fray, Alline; Paiva, Saul Martins; Parisotto, Thaís Manzano; Bonini, Gabriela Azevedo de Vasconcelos Cunha; Siegl, Regina Maura Coli; Imparato, José Carlos Pettorossi (Revista Gaúcha de Odontologia, 2015)