Quantifying the immediate post-implantation strain field of cadaveric tibiae implanted with cementless tibial trays: A time-elapsed micro-CT and digital volume correlation analysis during stair descent

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dc.contributor.authorWearne, L.S.
dc.contributor.authorRapagna, S.
dc.contributor.authorAwadalla, M.
dc.contributor.authorKeene, G.
dc.contributor.authorTaylor, M.
dc.contributor.authorPerilli, E.
dc.date.issued2024
dc.descriptionAvailable online 28 December 2023
dc.description.abstractPrimary stability, the mechanical fixation between implant and bone prior to osseointegration, is crucial for the long-term success of cementless tibial trays. However, little is known about the mechanical interplay between the implant and bone internally, as experimental studies quantifying internal strain are limited. This study employed digital volume correlation (DVC) to quantify the immediate post-implantation strain field of five cadaveric tibiae implanted with a commercially available cementless titanium tibial tray (Attune, DePuy Synthes). The tibiae were subjected to a five-step loading sequence (0-2.5 bodyweight, BW) replicating stair descent, with concomitant time-elapsed micro-CT imaging. With progressive loads, increased compression of trabecular bone was quantified, with the highest strains directly under the posterior region of the tibial tray implant, dissipating with increasing distance from the bone-implant interface. After load removal of the last load step (2.5BW), residual strains were observed in all of the five tibiae, with residual strains confined within 3.14 mm from the bone-implant interface. The residual strain is reflective of the observed initial migration of cementless tibial trays reported in clinical studies. The presence of strains above the yield strain of bone accepted in literature suggests that inelastic properties should be included within finite element models of the initial mechanical environment. This study provides a means to experimentally quantify the internal strain distribution of human tibia with cementless trays, increasing the understanding of the mechanical interaction between bone and implant.
dc.description.statementofresponsibilityLauren S. Wearne, Sophie Rapagna, Maged Awadalla, Greg Keene, Mark Taylor, Egon Perilli
dc.identifier.citationJournal of the Mechanical Behavior of Biomedical Materials, 2024; 151:106347-1-106347-10
dc.identifier.doi10.1016/j.jmbbm.2023.106347
dc.identifier.issn1751-6161
dc.identifier.issn1878-0180
dc.identifier.urihttps://hdl.handle.net/2440/142225
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/LE180100136
dc.rights© 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
dc.source.urihttp://dx.doi.org/10.1016/j.jmbbm.2023.106347
dc.subjectBone-implant interface
dc.subjectCementless tibial tray
dc.subjectDigital volume correlation
dc.subjectInternal strain field
dc.subjectPrimary stability
dc.subjectTime-elapsed micro-CT scanning
dc.subject.meshTibia
dc.subject.meshHumans
dc.subject.meshCadaver
dc.subject.meshArthroplasty, Replacement, Knee
dc.subject.meshX-Ray Microtomography
dc.subject.meshBone-Implant Interface
dc.titleQuantifying the immediate post-implantation strain field of cadaveric tibiae implanted with cementless tibial trays: A time-elapsed micro-CT and digital volume correlation analysis during stair descent
dc.typeJournal article
pubs.publication-statusPublished

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