Biomechanical Performance between Single and Double Lag Screw Trochanteric Gamma Nail used to Stabilize Femoral Neck Fracture: A Finite Element Study

Authors

  • Melvin Stanley Veerasakul Kasetsart University
  • Sujin Wanchat Kasetsart University
  • Nattapon Chantarapanich Kasetsart University

DOI:

https://doi.org/10.4186/ej.2021.25.2.183

Keywords:

trochanteric gamma nail, double lag screw, femoral neck fractures, finite element analysis

Abstract

This study was conducted to compare a biomechanical performance between trochanteric gamma nail with single lag screw and double lag screw in the treatment of femoral neck fracture and femoral neck fracture without lesser trochanter. A 3D model of Thai femur was reconstructed from computed tomography spiral scanner whereas a trochanteric gamma nail was reconstructed with the data obtained from 3D laser scanner. A virtual insertion of the nail and femur was done by computer aided design (CAD) software before imported to finite element analysis. The FE models were analysed in the early stage of fracture. Von Mises stress of implant and elastic strain of fracture were observed for each cases. The results showed that a double lag screw provided a better biomechanical performance in femoral neck fracture, especially in femoral neck fracture without lesser trochanter. According to the results, a double lag screw had a lower von Mises stress value on the implant compared to a single lag screw. The elastic strain showed a low value in all double lag screw cases, indicated that a double lag screw produced higher fracture stability.

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Author Biographies

Melvin Stanley Veerasakul
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Department of Mechanical Engineering, Faculty of Engineering at Sriracha, Kasetsart University, Sriracha, Chonburi, Thailand

Sujin Wanchat
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Department of Mechanical Engineering, Faculty of Engineering at Sriracha, Kasetsart University, Sriracha, Chonburi, Thailand

Nattapon Chantarapanich
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Department of Mechanical Engineering, Faculty of Engineering at Sriracha, Kasetsart University, Sriracha, Chonburi, Thailand

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Published In
Vol 25 No 2, Feb 28, 2021
How to Cite
[1]
M. S. Veerasakul, S. Wanchat, and N. Chantarapanich, “Biomechanical Performance between Single and Double Lag Screw Trochanteric Gamma Nail used to Stabilize Femoral Neck Fracture: A Finite Element Study”, Eng. J., vol. 25, no. 2, pp. 183-191, Feb. 2021.
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