A comparative study on mechanical properties of porous titanium implant

Mohammad Khodaei, Mehdi Razavi

Abstract


Background: Porous titanium scaffolds are promising candidates for bone reconstruction. In the load-bearing applications, predicting the mechanical properties of scaffolds are important.

Materials and methods: In this study, we developed a titanium scaffold with 55, 65 and 75% porosity using powder metallurgy technique, to investigate the effect of porosity on the mechanical properties of scaffold. The micro-structure of the scaffolds were studied using scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses. The plateau stress of titanium scaffolds was measured using compression test and compared to an analytical model.

Results and discussion: According to the SEM results, by increasing the porosity of scaffold from 55 to 75%, the thickness of struts became thinner. While results of XRD analysis did not indicate any impurity at fabricated scaffolds, the results of experimentally measured and analytically calculated plateau stress of titanium scaffolds, differ significantly, particularly at higher porosities (i.e. 75%).


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References


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