Research article Special Issues

A study into the fracture control of 3D printed intraosseous transcutaneous amputation prostheses, known as ITAPs

  • Received: 07 November 2019 Accepted: 14 February 2020 Published: 17 February 2020
  • Amputated femurs traditionally have multiple health concerns, including the risk of infection. One way to mitigate this risk could be to use an intraosseous transcutaneous amputation prosthesis (ITAP), which is a way of attaching a prosthesis directly to the bone of the user. This paper attempts to customize an ITAP used in a transfemoral amputation so that it fails in a controlled manner, should failure be unavoidable. ABS specimens were 3D Printed and tested to understand how current designs fail. From these tests, an alternative design was developed. Simulations were conducted to insure the optimized design would withstand expected forces from walking. Titanium samples were then produced using additive manufacture and were subjected to tensile testing. These specimens incorporated a notch in the centre of the specimen to act as a stress concentrator. The design presented in this paper identified that the location of failure should move towards the prosthesis, and away from the femur. It was also shown that, titanium was found to have a greater breaking force than the femur; and is therefore not viable for use at this current stage.

    Citation: Joshua Bird, Euan Langford, Christian Griffiths. A study into the fracture control of 3D printed intraosseous transcutaneous amputation prostheses, known as ITAPs[J]. AIMS Bioengineering, 2020, 7(1): 29-42. doi: 10.3934/bioeng.2020003

    Related Papers:

  • Amputated femurs traditionally have multiple health concerns, including the risk of infection. One way to mitigate this risk could be to use an intraosseous transcutaneous amputation prosthesis (ITAP), which is a way of attaching a prosthesis directly to the bone of the user. This paper attempts to customize an ITAP used in a transfemoral amputation so that it fails in a controlled manner, should failure be unavoidable. ABS specimens were 3D Printed and tested to understand how current designs fail. From these tests, an alternative design was developed. Simulations were conducted to insure the optimized design would withstand expected forces from walking. Titanium samples were then produced using additive manufacture and were subjected to tensile testing. These specimens incorporated a notch in the centre of the specimen to act as a stress concentrator. The design presented in this paper identified that the location of failure should move towards the prosthesis, and away from the femur. It was also shown that, titanium was found to have a greater breaking force than the femur; and is therefore not viable for use at this current stage.



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    Acknowledgments



    The authors would like to acknowledge the support of the Future Manufacturing Research Institute, College of Engineering, Swansea University and Advanced Sustainable Manufacturing Technologies (ASTUTE 2022) project, which is partly funded from the EU's European Regional Development Fund through the Welsh European Funding Office, in enabling the research upon which this paper is based. Further information on ASTUTE can be found at www.astutewales.com.

    Conflict of interest



    The authors declare no conflict of interests.

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