cylinders of microfil and small-particle light-cured composite resin were bonded to the flattened labial enamel surface of young bovine incisor teeth which had previously been subjected to four different treatments : ( 1 ) teeth immersed in 35 % hydrogen peroxide ( hp ) for 60 min and etched ( e ) with 37 % phosphoric acid gel for 60 sec ;
C0011350
enamel
C0040426
teeth