Analysis of the shelf life of chitosan stored in different types of packaging, using colorimetry and dentin microhardness - Cruz Filho, Antonio Miranda da; Bordin, Angelo Rafael de Vito; Souza-Flamini, Luis Eduardo; Guedes, Débora Fernandes da Costa; Saquy, Paulo César; Silva, Ricardo Gariba; Pécora, Jesus Djalma (Restorative Dentistry and Endodontics, 2017)