T. Kodaka et al., SCANNING LASER MICROSCOPIC SURFACE PROFILES OF HUMAN ENAMEL AND DENTIN AFTER BRUSHING WITH ABRASIVE DENTIFRICE INVITRO, Scanning microscopy, 7(1), 1993, pp. 247-254
Automatic brushing with and without commercial dentifrice containing c
alcium hydrogenphosphate as an abrasive, commonly available in Japan,
was performed on the tangential ground surfaces of sound enamel and de
ntin in human young premolar teeth with loading of about 120 g for 10
minutes in vitro. Their brushed surfaces were observed with a scanning
electron and a scanning laser microscope. Brushing with abrasive dent
ifrice caused rough surfaces to appear and the abrasion of the enamel
and the dentin was measured to be about 0.1 and 1.5 mum/min in mean de
pth, respectively. Under brushing with only distilled water, however,
the enamel surfaces remained intact while the dentin surfaces became s
moother.