Microtensile bond strength of dual-cured resin luting cements to dentin by the type of dentin adhesives

This study was performed to investigate the bond strength between 4 dentin adhesives and resin luting cements by means of mu TBS test. The materials used in this study were four resin cements (Choice, Panavia F, RelyX ARC, Bistite II DC), one 3-step adhesive (All-Bond2), one 2-step self-etching adhesive (Clearfil SE-Bond) and two 1-step self-etching adhesives(Prompt L-Pop and One-Up Bond F). Combination of 4 different dentin adhesives with 4 resin cements made up 16 experimental groups. Extracted human mandibular third molars without caries and restoratives were stored in saline and used within I month of extraction. All adhesive systems and resin cements were manipulated and applied to the dentin surfaces according to the manufactures' instructions. The resin composite "overlays" prepared with 6 mm thickness (Tescera, Bisco Inc., Schaumburg, IL, USA) were luted with each resin cement. Each sample was measured mu TBS. 1-step self-etching adhesives coupled with all resin luting cements used in this study resulted in lower bond strength except of OU-PA group. When Choice, RelyX ARC and Bistite 11 were used, Clearfil SE-Bond showed significantly higher mu TBS values than 1-step self-etching adhesives (p<0.05). Clearfil SE-Bond did not show significant mu TBS values than All-Bond 2 that is conventional 3-step dentin adhesive (p>0.05).