Evaluation of Surface Roughness and Biological Behavior of TiNb Alloys

Titanium – niobium alloys has perfect biocompatibility and high tendency to attach living tissue, making it preferable Ti- base alloys for orthopedic implants. This is Due to the combination of excellent mechanical properties high corrosion resistance. The work aims to evaluate the cell activity of Ti –Nb with different Nb percentage; (10 %wt., 20%wt. and 30%wt) produced by powder technology . also chemical surface treatment carried out by dual acid alkaline etching to create suitable surface roughness before deposition, while deposition process accomplished by pack cementation .The Characterizations of samples includes: microstructure observation by SEM , x-ray diffraction (XRD), MTT Assay (cell viability) and MTT assay (cell adhesion). From the SEM figures it is obvious that as niobium percentage increase there was large change in microstructure texture comparing with pure sample or other less Nb percentage refer that the niobium percentage (30%) was preferable to obtain fully and stable beta( β) phase in Titanium–Niobiom alloys. From XRD patterns the β phase would appear after Nb addition in different percentage and there was slightly increased in peak intensity with increasing niobium content. From MTT graphs it was found that the increasing in Nb content (30%wt.) Lead to high cell activity (viability) after 3 days of exposure in MG-63 cells and there was remarkable increase in cell viability and cell attachment compared with pure Ti- samples.