| Title: | Total Knee replacement with an uncemented porous tantalum tibia component: A failure analysis |
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| Authors: | ID Fokter, Samo K. (Author)
ID Gubeljak, Nenad (Author)
ID Punzón Quijorna, Esther (Author)
ID Pelicon, Primož (Author)
ID Kelemen, Mitja (Author)
ID Vavpetič, Primož (Author)
ID Predan, Jožef (Author)
ID Ferlič, Luka (Author)
ID Novak, Igor (Author) |
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| Files: |  materials-15-02575-v3.pdf (5,90 MB)
MD5: 1E272BDFA17161C4D4569FC6770266F0
 https://www.mdpi.com/1996-1944/15/7/2575
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | Porous tantalum has been extensively used in orthopaedic surgery, including uncemented
total knee arthroplasty (TKA). Favourable results were reported with earlier monobloc tibial components and the design evolved to modular implants. We aimed to analyse possible causes for extensive
medial tibia bone loss, resulting in modular porous tantalum tibia baseplate fracture after primary
TKA. Retrieved tissue samples were scanned with 3 MeV focused proton beam for Proton-Induced
X-ray Emission (micro-PIXE) elemental analysis. Fractographic and microstructural analysis were
performed by stereomicroscopy. A full 3D finite-element model was made for numerical analysis
of stress–strain conditions of the tibial baseplate. Histological examination of tissue underneath
the broken part of the tibial baseplate revealed dark-stained metal debris, which was confirmed by
micro-PIXE to consist of tantalum and titanium. Fractographic analysis and tensile testing showed
that the failure of the tibial baseplate fulfilled the criteria of a typical fatigue fracture. Microstructural
analysis of the contact surface revealed signs of bone ingrowth in 22.5% of the surface only and
was even less pronounced in the medial half of the tibial baseplate. Further studies are needed to
confirm the responsibility of metal debris for an increased bone absorption leading to catastrophic
tibial tray failure. |
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| Keywords: | total knee arthroplasty, uncemented, cementless, trabecular metal, porous tantalum, tibial component, cementless baseplate fracture |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 20.02.2022 |
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| Article acceptance date: | 30.03.2022 |
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| Publication date: | 31.03.2022 |
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| Publisher: | MDPI AG |
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| Year of publishing: | 2022 |
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| Number of pages: | 13 str. |
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| Numbering: | Vol. 15, iss. 7 (2575) |
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| PID: | 20.500.12556/DKUM-92204  |
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| UDC: | 620.18:615.461 |
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| ISSN on article: | 1996-1944 |
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| COBISS.SI-ID: | 103785475 |
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| DOI: | 10.3390/ma15072575 |
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| Copyright: | © 2022 by the authors |
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| Publication date in DKUM: | 20.03.2025 |
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| Views: | 208 |
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| Downloads: | 15 |
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| Metadata: |    |
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| Categories: | Misc.
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