PENGARUH WAKTU APLIKASI DAN BAHAN PELARUT BONDING SETELAH PEMUTIHAN GIGI EKSTRAKORONAL TERHADAP KEKUATAN GESER PELEKATAN RESIN KOMPOSIT PADA EMAIL

Exstracoronal bleaching is tooth whitening on vital teeth to remove the discoloration. After blaching needs to be done on the composite resin restorations contained anterior teeth restoration because the color is not clinically appropriate and necessary to adjust the color to make it more natural. The objective of this study was to evaluate the difference of enamel shear bond strength after extracoronal bleaching with different times of application and solvents. Flat buccal enamel surfaces were obtained on 30 extracted human maxilla premolars. The speciments were divided into 2 equal groups (n=15). The groups were further divided into 3 subgroups. Restorations in group I werw conducted using an acetone based adhesive and in group II were conducted using an ethanol based adhesive. There was no bleaching treatment of control specimens in group IA and IIA. Restorations using resin composite were conducted immediately after bleaching in group IB and IIB, also after 7 days of bleaching in group IC and IIC. Shear Bond Strength test were conducted for all speciments with a universal testing machine. Data were statistically analyzed by using two way ANAVA and LSD test. The test results two way ANAVA tests show that there were statistically significant difference among times of application groups, and there was no significant difference among the different solvent groups. In this study, concluded that ethanol and acetone based bonding agents could not increase the shear bond strength of composite to enamel