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Mechanical Sciences An open-access journal for theoretical and applied mechanics

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Mech. Sci., 8, 259-266, 2017
https://doi.org/10.5194/ms-8-259-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
15 Aug 2017
Comparison of parallel or convergent proximal schanz screw placement of pertrochanteric fixator in intertrochanteric fracture model
Arif Gok1, Sermet Inal2, Ferruh Taspinar3, Eyyup Gulbandilar4, and Kadir Gok5 1Amasya University, Technology Faculty, Mechanical Engineering, 05000 Amasya, Turkey
2Dumlupinar University, School of Medicine, Department of Orthopaedics and Traumatology, Campus of Evliya Celebi, 43100 Kutahya, Turkey
3Dumlupinar University, School of Health Science, Department of Physiotherapy and Rehabilitation, 43100 Kutahya, Turkey
4Eskisehir Osmangazi University, Faculty of Engineering & Architecture, Department of Computer Engineering, Meselik Campus, 26480 Eskisehir, Turkey
5Manisa Celal Bayar University, Hasan Ferdi Turgutlu Teknoloji Fakültesi, Mechanical and Manufacturing Engineering, 45400 Manisa, Turkey
Abstract. Intertrochanteric femoral fractures are serious traumas among elderly patients. In these patients, external fixator is a preferable method for the fixation of fractures. Therefore, this study was planned to compare the parallel and convergent proximal schanz screw placement of pertrochanteric fixator in the intertrochanteric femoral fractures with respect to biomechanical forces that stabilize the fracture line and to present their clinical importance. A commercial finite element based program, AnsysWorkbench was used to investigate the biomechanical parameters of the femoral intertrochanteric fractures and different placement of implants. The von Mises stress, von Mises strain and shear stress on the proximal and distal surface of the fracture line were lower in the convergent pertrochanteric fixator. Proximal schanz screws in convergent configuration pertrochanteric fixator had greater stress and strain values than proximal schanz screws in parallel configuration pertrochanteric fixator. The distance between the proximal schanz screws on the fracture line was measured as 12 mm in convergent configuration pertrochanteric fixator, and as 3.5 mm in parallel configuration pertrochanteric fixator. The angle between the proximal schanz screws in the convergent configuration was measured as 12.88°. The effect of convergent and parallel configuration pertrochanteric fixators on axial loading demonstrated that convergent configuration pertrochanteric fixator was safer in this respect.

Citation: Gok, A., Inal, S., Taspinar, F., Gulbandilar, E., and Gok, K.: Comparison of parallel or convergent proximal schanz screw placement of pertrochanteric fixator in intertrochanteric fracture model, Mech. Sci., 8, 259-266, https://doi.org/10.5194/ms-8-259-2017, 2017.
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Short summary
In our study, our aim was biomechanically to investigate the effectiveness of Pertrochanteric Fixators (PTFs) applied with two different configurations of schanz screws inserted to the femoral head in ITFs.
In our study, our aim was biomechanically to investigate the effectiveness of Pertrochanteric...
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