Reproducibility of microhardness measurements in different surfaces

1 PhD student, Univ. Estadual Paulista – UNESP, Araraquara School of Dentistry, Department of Restorative Dentistry, Araraquara, SP, Brazil. 2 MSc, Univ. Estadual Paulista – UNESP, Araraquara School of Dentistry, Department of Restorative Dentistry, Araraquara, SP, Brazil. 3 Assistent Professor, Univ. Estadual Paulista – UNESP, Araraquara School of Dentistry, Department of Restorative Dentistry, Araraquara, SP, Brazil. 4 Professor, Univ. Estadual Paulista – UNESP, Araraquara School of Dentistry, Department of Department of Dental Materials and , Araraquara, SP, Brazil.