Material and Methods: 3 different aesthetic post systems (RelyXTM fiber post, C-Post® zirconium oxide post, Easy Post ^TM zirconia reinforced fiber post), including 40 from each, were used. On these posts, 3 different surface treatments (Er:YAG laser, Nd:YAG laser and Femtosecond (Fs) laser), including 10 pieces from each system, were applied. In the remaining 10 samples, no action was taken, and a control group was created. The obtained posts were cemented into the composite post slots of 12 mm length and 4 mm diameter using self-adhesive resin cement (RelyXTM U200). From the coronal, medial and apical regions of each prepared sample, 2 mm-thick sections were taken to make push-out tests. Afterward, the push-out resistance was measured using a universal testing machine with 0.5 mm/min head speed.

Results: There were statistically significant differences between the glass fiber posts and the zirconium-reinforced glass fiber posts with zirconium posts (p<0.05). The zirconium posts had lower bond strength values. Regarding the etching procedures conducted on the zirconium posts, the Fs lasers and Nd: YAG lasers were found to be more effective (p<0.05).

Conclusion: Surface treatments may be applied for increasing the bond strength of zirconium oxide posts, which have lower bond strength than glass fiber posts. Surface treatments conducted with Nd:YAG and Fs lasers increase the value of bond strength of zirconium posts.