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| http://dx.doi.org/10.21037/atm.2017.06.42 | DOI Listing |
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Association of Total Hip Arthroplasty Flexural Rigidity With Magnetic Resonance Imaging and Histological Findings.
J Arthroplasty
August 2024
Hospital for Special Surgery, Department of Radiology, New York, New York.
Background: Modular connections in total hip arthroplasty (THA) offer surgical advantages, but can contribute to implant fretting and corrosion due to micromotion at the head-stem interface. Previous studies implicated lower flexural rigidity as a key contributing factor to THA corrosion and fretting, but none associated flexural rigidity with direct histological evaluation or magnetic resonance imaging (MRI) outcomes. The purpose of this study was to determine how implant flexural rigidity is associated with MRI imaging metrics and histopathological outcomes in patients who have a failed THA.
View Article and Find Full Text PDFDesign and Performance Evaluation of a Novel Spiral Head-Stem Trunnion for Hip Implants Using Finite Element Analysis.
Materials (Basel)
February 2023
Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA.
With an expectation of an increased number of revision surgeries and patients receiving orthopedic implants in the coming years, the focus of joint replacement research needs to be on improving the mechanical properties of implants. Head-stem trunnion fixation provides superior load support and implant stability. Fretting wear is formed at the trunnion because of the dynamic load activities of patients, and this eventually causes the total hip implant system to fail.
View Article and Find Full Text PDFThe effect of trunnionosis on the risk of re-revision following femoral head exchange in hip arthroplasty.
Hip Int
November 2023
Department of Orthopaedic Surgery, Sir Charles Gairdner Hospital, Nedlands, WA, Australia.
Background: Fretting corrosion at modular junctions contributes to arthroplasty failure. Currently, no evidence-based guidelines are available regarding the acceptable level of trunnion corrosion that can occur . We aimed to examine the relationship between trunnion corrosion and risk of re-revision to assist surgeons with intraoperative decision making.
View Article and Find Full Text PDFPre-clinical evaluation of fretting-corrosion at stem-head and stem-cement interfaces of hip implants using in vitro and in silico models.
J Biomed Mater Res B Appl Biomater
November 2022
Biomechanical Engineering Laboratory (LEBm), University Hospital, Department of Mechanical Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil.
Prior to clinical use, the corrosion resistance of new prosthesis system must be verified. The fretting-corrosion mechanisms of total hip arthroplasty (THA) implants generate metal debris and ions that can increase the incidence of adverse tissue reactions. For cemented stems, there are at least two interfaces that can be damaged by fretting-corrosion: stem-head and stem-cement.
View Article and Find Full Text PDFEffect of surface topography and residual stress on the taper connection stability in total hip arthroplasty.
J Mech Behav Biomed Mater
April 2022
Institute for Applied Materials, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany. Electronic address:
In the present work, the influence of the trunnion surface topography and the near-surface residual stresses on the joining process of a taper connection is examined using a replicate of the realistic taper connection as it occurs in conventional hip joint implants. The focus of the work is on the surface of the taper trunnion made of Ti6Al4V ELI and its effect on the connection stability with a CoCrMo counterpart. In this regard, the interrelation between surface topography, residual stresses, the joining behavior and the corrosion behavior under dynamic loading have been systematically investigated.
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