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Comparison of the biomechanical effects of pertrochanteric fixator and dynamic hip screw on an intertrochanteric femoral fracture using the finite element method
Author(s) -
Inal Sermet,
Taspinar Ferruh,
Gulbandilar Eyyup,
Gok Kadir
Publication year - 2015
Publication title -
the international journal of medical robotics and computer assisted surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 53
eISSN - 1478-596X
pISSN - 1478-5951
DOI - 10.1002/rcs.1584
Subject(s) - von mises yield criterion , dynamic hip screw , materials science , orthodontics , finite element method , implant , displacement (psychology) , biomechanics , stress (linguistics) , fracture (geology) , femur , composite material , medicine , structural engineering , surgery , anatomy , engineering , psychology , linguistics , philosophy , psychotherapist
Background This study was conducted to examine and compare the pertrochanteric fixator (PTF) and dynamic hip screw (DHS). Methods AnsysWorkbench, a commercial finite element based program, was used to investigate the biomechanical parameters of femoral fractures and implants. The human femoral model was scanned and a femoral intertrochanteric fracture was created. Von Mises stress, von Mises strain, and shear and deformation forces on the upper and lower parts of the fracture line; and the von Mises stress, von Mises strain parameters of the screws and implant bodies during axial loading were calculated and compared. Results It was determined that the magnitude of displacement forces along the fracture line was lower in PTF. Regarding the von Mises stress and von Mises strain values on the implant bodies, the DHS body had higher levels compared with the PTF body. Conclusion This study demonstrated that PTF is more favorable than DHS for early axial loading and ambulation. Copyright © 2014 John Wiley & Sons, Ltd.