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Explicit finite element modeling of wear within the patellofemoral joint in total knee replacement

Bahadoran, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1109/ICBME49163.2019.9030416
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. Total knee replacement (TKR) surgery is one of the most successful and cost-effective procedures for treating knee injuries performed in orthopedics. However, the knee replacement revision surgery will probably be required after some years. Wear at the contact area between femoral metal component and the polyethylene inserts in TKR is recognized as one of the foremost causes of prosthesis failure and necessity of revision surgery. In the present study, focusing on the patellofemoral joint (PFJ), the wear at the contact area between the patellar and femoral components has been simulated employing the explicit finite element modeling. In this regard, common types of patellar component surface configurations, including dome, modified dome, offset dome, anatomic and mobile bearing, have been considered in this simulation. Besides, the effect of the curvature radius of the dome-shaped patellar component on wear behavior has been investigated. Finally, the maximum depth and volume of wear were calculated and compared among these different designs, using Archard's law. The results showed that more conforming articulation surfaces in the PFJ, increased the contact area, whereas reduced the contact stresses. Additionally, the decrement of contact stresses led to reduced wear volume of the patellar component. According to the results, the anatomical and mobile bearing designs indicated minimum wear depth due to their higher geometrical conformity with the femoral surface. © 2019 IEEE
  6. Keywords:
  7. Finite element model ; Geometrical conformity ; Patellar component, wear ; Total knee replacement ; Arthroplasty ; Bearings (machine parts) ; Biomedical engineering ; Cost effectiveness ; Domes ; Finite element method ; Implants (surgical) ; Joints (anatomy) ; Wear of materials ; Explicit finite elements ; Mobile bearing designs ; Patellar components ; Patellofemoral joint ; Polyethylene inserts ; Prosthesis failure ; Surface configuration ; Total knee replacement ; Knee prostheses
  8. Source: 26th National and 4th International Iranian Conference on Biomedical Engineering, ICBME 2019, 27 November 2019 through 28 November 2019 ; 2019 , Pages 208-212 ; 9781728156637 (ISBN)
  9. URL: https://ieeexplore.ieee.org/abstract/document/9030416