Evaluation of mechanical and electrochemical properties of laser surface modified Ti–6Al–4V for biomedical applications: in vitro study

Abstract

The effect of Nd:YAG laser surface modification on the microtopography and physicochemical properties of Ti-6Al-4V alloy has been investigated with a view of biomedical applications. The surface roughness and hardness of laser treated samples at 140 J cm 22 were found to be 7¡0?02 and 825 VHN respectively. The superior microhardness value can be attributed to grain refinement associated with laser melting and rapid solidification. The electrochemical property, mainly pitting corrosion resistance, has been carried out in Hank's salt balanced physiological solution using standard potentiodynamic polarisation testing. A higher corrosion potential of 20?21 V was achieved for laser treated samples. At the optimum of laser fluence (140 J cm 22 ), energy dispersive X-ray analysis showed about a 30% decrease in vanadium content. Contact angle measurements also indicated improved surface wettability (i.e. hydrophilicity) characteristics at 35u. Finally, cell culture studies provided a useful tool to investigate the morphology and cell cytotoxicity of the laser treated surfaces.

Laser Surface Texturing for Biomedical Applications: A Review

“…The culture of cells shows that microgrooves on titanium alloy created by LST substantially increase the augmentation and distinction of MC3T3-E1 cells, which indicates the improvement in bioactivity [56]. Surface alteration by Nd-YAG laser on titanium alloy was also performed, and it was revealed that the smooth surface could release extra cell adhesion owing to its rise in surface tension and decrease in contact angle [57]. Further, the detachment of the enzyme test verified that maximum cells are affixed to the LTS at 140 J cm −2 and lesser to the untreated sample.…”

“…The process decreases bacterial adhesion and biofilm formation related to the polished surface. The authors also concluded that femtosecond LST is a capable way for bestowing orthopedic and dental implants with antibacterial characteristics and reducing Surface alteration by Nd-YAG laser on titanium alloy was also performed, and it was revealed that the smooth surface could release extra cell adhesion owing to its rise in surface tension and decrease in contact angle [57]. Further, the detachment of the enzyme test verified that maximum cells are affixed to the LTS at 140 J cm −2 and lesser to the untreated sample.…”

Human Embryonic Stem Cell-Derived Mesenchymal Progenitor (hESCs-MP) Growth on Nanostructured Ti6Al4V Surfaces

“…Titanium and its alloys have recently been broadly employed as the preferred biomaterial for orthopedic implants due to their desirable mechanical and biological properties [1][2][3] . It has also been shown that it is important to control the surface properties of these orthopedic implants, such as their corrosion resistance, biocompatibility, mechanical resistance, and fatigue resistance.…”

Laser ablation of phosphor bronze for superhydrophobic surface

“…Investigation of laser surface melting of a manganesenickel-aluminium bronze was carried out by Tang et al 12 They indicated that erosion-corrosion synergism constituted a significant contribution to the overall cavitation erosion-corrosion in 3?5 wt-%NaCl solution for the treated surface. Mechanical and electrochemical properties of laser surface modified titanium alloy for biomedical applications were examined by Khosroshahi et al 13 They showed that the high value of microhardness was resulted, which could be attributed to grain refinement associated with laser melting and rapid solidification. Laser melt injection of WC particles on aluminium surface was studied by Li et al 14 They demonstrated that the powder should be fed from the back side of the laser beam to achieve appropriate surface enhancement effect and the depth of the melt layer increased first and, then, decreased with increasing laser power.…”