Artificial methods of dentine caries induction: a hardness and morphological comparative study - Marquezan, Marcela; Correa, F. N.; Sanabe, Mariane Emi; Rodrigues Filho, Leonardo Eloy; Hebling, J.; Mendes, Fausto Medeiros; Guedes-Pinto, Antônio Carlos (Archives of oral biology, 2009)