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http://hdl.handle.net/1942/33151
Title: | The effect of different interference fits on the primary fixation of a cementless femoral component during experimental testing | Authors: | Sanchez, Esther Schilling, Christoph Grupp, Thomas M. Giurea, Alexander Wyers, Caroline VAN DEN BERGH, Joop Verdonschot, Nico Janssen, Dennis |
Issue Date: | 2021 | Publisher: | ELSEVIER | Source: | Journal of the Mechanical Behavior of Biomedical Materials, 113 (Art N° 104189) | Abstract: | Cementless femoral total knee arthroplasty (TKA) components use a press-fit (referred to as interference fit) to achieve initial fixation. A higher interference fit could lead to a superior fixation, but it could also introduce more damage to the bone during implantation. The purpose of the current study was to investigate the effect of interference fit on the micromotions and gap opening/closing at the bone-implant interface. Experimental tests were performed in six pairs of cadaveric femurs implanted with femoral components using a low interference fit of 350 mu m and a high interference fit of 700 mu m. The specimens were subjected to the peak loads of gait and squat, based on the Orthoload dataset. Digital Image Correlation (DIC) was used to measure the micromotions and opening/closing in different regions of interest (ROIs). Two linear mixed-effect statistical models were created with micromotions and gap opening/closing as dependent variables. ROIs, loading conditions, and implant designs as independent variables, and cadaver specimens as random intercepts. The results revealed no significant difference between the two interference fit implants for micromotions (p = 0.837 for gait and p = 0.065 for squat), nor for the gap opening/closing (p = 0.748 for gait and p = 0.561 for squat). In contrast, significant differences were found between loading and most of the ROIs in both dependent variables (p < 0.0001). Additionally, no difference in bone deformation was found between low and high interference fit. Changing interference between either 350 mu m or 700 mu m did not affect the primary stability of a femoral TKA component. There could be an interference fit threshold beyond which fixation does not further improve. | Notes: | Sanchez, E (corresponding author), Orthopaed Res Lab 611,Geert Gmotepl Zuid 30, NL-6525 GA Nijmegen, Netherlands. Esther.SanchezGarza@radboudumc.nl |
Other: | Sanchez, E (corresponding author), Orthopaed Res Lab 611,Geert Gmotepl Zuid 30, NL-6525 GA Nijmegen, Netherlands. Esther.SanchezGarza@radboudumc.nl | Keywords: | Interference fit;Cementless fixation;Micromotion;Interfacial gap;Digital image correlation;Bone deformation | Document URI: | http://hdl.handle.net/1942/33151 | ISSN: | 1751-6161 | e-ISSN: | 1878-0180 | DOI: | 10.1016/j.jmbbm.2020.104189 | ISI #: | WOS:000599657400003 | Rights: | 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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1-s2.0-S1751616120307311-main.pdf | Published version | 6.1 MB | Adobe PDF | View/Open |
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