Aim: To analyse in vitro bioactivity of Ti6Al4V surfaces processed with Er:YAG laser at different parameters.

Materials and methods: Ti6Al4V discs ( Ø = 7 mm) were used. Five treatment groups (3 samples for each) were prepared. Surfaces treated with Er:YAG laser at different parameters. SEM and roughness surface analysis of the samples were performed before and after laser process. Finally, samples were embedded in simulated body fluid (SBF) for 1, 3 and 7 days and Ca and P values of HA accumulation on the surface were evaluated.

Results: VSP and SSP modes at same frequencies provided more surface irregularity at higher power settings. However, increase of frequency at a constant power setting produced more superficial surface topography, while lower Hz values yielded deeper irregularity. At constant power and Hz values pulse modes varied and shorter pulses (SSP and VSP) created deeper recesses on Ti surface. SEM/EDS analyses didn’t show any meaningful difference between all groups with regard of Ca/P composition of HA deposit.

Conclusions: Er:YAG laser treatment at different settings can enhance surface roughness. However, behavior of modified Ti surfaces did not show any difference in SBF.

Conflict of interest: None declared.