Enamel fragments preparation
tooth
One hundred and twenty sound bovine tooth fragments (6 x 6 x 2 mm), without
cracks and stains, were cut (Isomet 100 Buehler, Illinois, USA). The fragments
were flattened using 320-, 600-and 1200-grit abrasive papers to standardize the
thickness (1 mm of enamel and 1 mm of dentin) 