Abstract
Abstract This research study is aimed at finding a suitable uncoated metallic biomaterial based on its wear properties and osseointegration ability for orthopedic implants. In the present work, wear tests were carried out on uncoated metallic biomaterials such as Co-Cr-Mo, SS316L, Ti6Al4V and Titanium grade 2. The wear tests were performed to determine friction coefficient and wear loss in the presence of simulated body fluid having a common pH of 7.25 similar to human plasma. The wear resistance was found to be highest for Co-Cr-Mo material followed by SS316L, Ti6Al4V and Titanium grade 2 material. To grow an apatite layer, uncoated metallic substrates were immersed for two weeks in a simulated body fluid having ion concentration equivalent to human blood plasma. Adhesive bonding strength of the apatite layer formed on the different bioimplant substrates was evaluated under tensile stress. The worn metallic surfaces post wear tests and metallic substrates with apatite layer were analyzed using scanning electron micrographs. From the results it was found that uncoated Ti6Al4V material is more suitable for orthopedic implants as compared to other materials studied in this work.
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