Experimental study of the strength of hip endoprosthesis elementsmade by 3D printing

Authors

  • Mykola Korzh
  • Vasyl Makarov
  • Mykola Shidlovsky
  • Vladlen Yermakov
  • Yurii Nikitin
  • Olga Pidgaiska
  • Оleksiy Tankut
  • Mykhaylo Karpinsky
  • Olena Karpinska
  • Olexandr Zakhovayko
  • Dmytro Chupryna

DOI:

https://doi.org/10.15674/0030-59872020412-17

Keywords:

3D-printing, additive technology, orthopedic implants, titanium alloy, hip arthroplasty, tensile strength of porous titanium structures

Abstract

Тhree-dimensional printing of porous titanium implants is a promi­sing area of additive production in orthopedic surgery. The question remains relevant mechanical strength and durability of such device. Objective. Determine in the experiment the strength of the stem, the neck of the stem and the cups of hip endoprosthes made by 3D-printing from titanium alloy, and compare with a similar rate of serial implants. Methods. The strength of the stem and cups of hip endoprostheses made by 3D-printing on an Arcam printer from titanium alloy TI6AL4V was studied. Serials hip implants made form titanium alloy. There were 3 samples of hip endoprostheses for each test. Stems of endoprostheses were exa­mined on the TIRATEST-2300 machine under the conditions of loading on a three-point bend, the necks of stems were exami­ned under the influence of combined load on the bend with a shift, the cups were examined on compression. Results. Tensile strength in the case of three-point bending of the stems of implants made by mechanical processing and 3D printing did not have any differences significantly (p = 0.146) and was (1480.62 ± 62.50) MPa and (1396.88 ± 50.90) MPa, respectively. The necks of stems of serial endoprostheses and made by 3D-printing had a comparable limit of strength — (408.61 ± 1.25) MPa and (403.49 ± 8.99) MPa, respectively (p = 0.384). Under the conditions of compression tests of cups of endoprostheses all the samples withstood a load of 98.0 kN without any signs of destruction. Conclusions. The va­lues of the tensile strength of the components of serial implants and those made by 3D-printing did not differ statistically significantly. Thus, 3D-porous structures have significant potential for creation of elements of hip endoprostheses.

Author Biographies

Mykola Korzh

MD, Prof. in Traumatology and Orthopaedics

Sytenko Institute of Spine and Joint Pathology National Academy of Medical Sciences of Ukraine, Kharkiv

Vasyl Makarov

PhD in Orthopaedics and Traumatology

Municipal non-profit enterprise «City Clinical Hospital № 16» of the Dnipro City Council. Ukraine

Mykola Shidlovsky

National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»

Vladlen Yermakov

Debora-Electro LTD, Dnipro. Ukraine

Yurii Nikitin

Debora-Electro LTD, Dnipro. Ukraine

Olga Pidgaiska

Sytenko Institute of Spine and Joint Pathology National Academy of Medical Sciences of Ukraine, Kharkiv

PhD in Traumatology and Orthopaedics

Оleksiy Tankut

Sytenko Institute of Spine and Joint Pathology National Academy of Medical Sciences of Ukraine, Kharkiv

 PhD in Traumatology and Orthopаedics

Mykhaylo Karpinsky

Sytenko Institute of Spine and Joint Pathology National Academy of Medical Sciences of Ukraine, Kharkiv

 

Olena Karpinska

Sytenko Institute of Spine and Joint Pathology National Academy of Medical Sciences of Ukraine, Kharkiv

 

Olexandr Zakhovayko

National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»

Dmytro Chupryna

Research and Production Enterprise «A-Tech», Kyiv. Ukraine

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