FILM THICKNESS OF VARIOUS DENTIN BONDING AGENTS

Curing dentine bonding agents create a film thickness on the surface o f teeth which are prepared for all-ceramic crowns. The aim of this stu dy was to investigate if the film thickness of dentine bonding agents (DBAs) is acceptable with the fit of definitive restorations of 50-100 mu m. AllBond 2(R), Syntac(R), ART Bond(R), P-Bond(R) (an experimenta l DBA), and the Primer of AllBond 2 were applied onto teeth which were prepared with standardized all-ceramic crown preparations. The DBAs w ere applied onto the prepared tooth surfaces according to manufacturer s' instructions and under a standardized simulation of intrapulpal pre ssure. After curing the DBAs, the teeth were cut mesiodistally and oro lingually and the film thickness was measured under a light microscope . Only the film thicknesses of AllBond 2 and P-Bond were low enough an d, therefore, would enable curing to take place immediately after thei r application.