Methods: Occlusal enamel of 40 extracted noncarious human third molars were removed using 100 grit SIC paper and smear layer on the mid-coronal dentin was standardized using 600 grit SIC. Resin coating on mid-coronal dentin was performed with a multi step total-etch adhesive (Syntac; Ivoclar Vivadent) and a flowable composite (Tetric EvoFlow; Ivoclar Vivadent). All resin coated specimens were temporized with a temporary filling material (Systemp. Inlay; Ivoclar Vivadent) and kept in distilled water for 7 days at 37oC. Then the specimens were randomly divided into 5 groups (n=8) according to the type of surface treatments applied on resin coating after etching; [silan+bonding (SB); bur+silan+bonding (BSB); bur+bonding (BB); silica coating+silan+bonding (SCSB); silica coating+bonding (SCB)]. Indirect overlays (SR Adoro; Ivoclar Vivadent) 5 mm in thickness and 8 mm in diameter were luted to the specimens with a dual cure resin cement (Variolink II; Ivoclar Vivadent). After storage in distilled water for 24 hours at 37OC, the specimens were sectioned into serial slabs in order to obtain 1x1mm composite-dentin discs. Microtensile bond strength was evaluated using a Bencor Multi Testing device attached to a universal testing machine (Instron). Data were analyzed using one way ANOVA and post hoc Tukey tests (p<0.05). Results: SCSB showed significantly the highest bond strength (41,05±7,02) (p<0.05) whereas there were no significant differences between BSB (32,91±6,66) and SCB (34,27±5,94) (p<0.05) while no significant differences were obtained between SB (27,27±5,75) and BB (24,70±5,85) which showed significantly the lowest bond strengths (p<0.05). Conclusions: Mechanical retention in conjuction with silane application improved bonding between resin coating and resin cement.