Objective: Self etching adhesive systems have been improved, and simplified the pretreatment method. All-in-one adhesive systems have been developed recently and used in clinical situations. The purpose of this study was to investigate the resin-dentin interface of all-in-one adhesive systems after Ar-ion laser etching by FE-SEM.

Methods: Coronal dentin surfaces of extracted human third molars were polished with a series of SiC paper to 800 grit. The polished sound dentin surface was partially coated with an etching protector belt-likely, in order to investigate the position of the hybrid layer relative to the untreated dentin surface. Each 8 dentin specimens were treated by 2 all-in-one adhesive systems, Clearfil Tri-S Bond (TS; Kuraray) and G-Bond (GB; GC) according to the manufacturer's instructions. Those specimens were sectioned vertically, and the resin-dentin interface was polished with aluminum polishing powder. The polished specimens were treated with Ar-ion laser etching 15 sec or 60 sec (Elionix EIS-200ER) and then observed under FE-SEM (Hitachi S-4000). The thickness of hybrid layer was measured by a standard microscale calibrated FE-SEM.

Results: The thickness of the hybrid layer was similarly appeared. The mean values of the thickness of the hybrid layer were TS15; 0.58(0.17), TS60; 0.55(0.16), GB15; 0.63(0.13), GB60; 0.61(0.19) micrometer (SD). Two-way ANOVA revealed no significant difference of two main factors, adhesive systems and Ar-ion laser etching time (p<0.05). However meshwork structure of GB60 had only partially disappeared underneath hybrid layer.

Conclusion: It could be suggested that the state of the resin-dentin interface was varied with the adhesive systems.

Back to the Dental Materials: II - Adhesion-Other Program
Back to the ADEA/AADR/CADR Meeting & Exhibition (March 8-11, 2006)

Top Level Search