Comparison of biomechanical properties of implant systems used in treatment of proximal femur fractures

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JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, vol.34, no.2, pp.812-818, 2019 (SCI-Expanded) identifier identifier


Various implant systems used in treatment of proximal femur fractures were investigated comparatively in this study. The intertrochanteric fractures prepared over fourth generation synthetic femur models were fixed with DHS, PFNA, Talon and Veronail implant systems. The models were positioned normally as in vivo by using polyurethane foam dying process. Test samples were subjected to the compression loading with crosshead speed controlled. The loads and displacements corresponding to the loads were recorded during the test and the graphs of displacements versus loads were obtained after test completed. In order to determine that whether the displacement values were statistically significant or not, Student T tests were performed. The physical changing in test samples were observed simultaneously by taking snapshot photo during the test. Whereas the DHS which is one of the extramedullary screw system in this study had the lowest load, they had the highest displacement values also they were concluded as the unsuccessful implant system as compared with others. The Talon implant system had the highest biomechanical properties, PFNA and Veronail systems followed this system. The displacement values of one lag screwed PFNA and two lags screwed Veronail are statistically insignificant and the changing in fracture lines verified this phenomenon. It is concluded that the Talon and PFNA implant systems would be used in treatment of intertrochanteric fractures successfully due to their higher biomechanical properties and clinical findings.