<div class="csl-bib-body">
<div class="csl-entry">Berger, L., Pahr, D. H., & Synek, A. (2022). Articular contact vs. embedding: Effect of simplified boundary conditions on the stress distribution in the distal radius and volar plate implant loading. <i>Journal of Biomechanics</i>, <i>143</i>, Article 111279. https://doi.org/10.34726/3544</div>
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dc.identifier.issn
0021-9290
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/152738
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dc.identifier.uri
https://doi.org/10.34726/3544
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dc.description.abstract
Boundary conditions (BCs) are often simplified in experimental and numerical models simulating distal radius fractures and their treatments. The aim of this study was to investigate the effects of simplified BCs at the radiocarpal joint: (1) on the stress distribution in the intact distal radius, and (2) on the loading of a volar locking plate (VLP) used for distal radius fracture treatment. Finite element models of the distal radius with contact between carpals and cartilage were created as reference models for an intact bone and a fractured bone with VLP treatment. Four models with simplified BCs were compared to these reference models: One with embedding material instead of carpals, one with carpals tied to the radius; each loaded either uniaxially or with statically equivalent loading to the reference model. Differences in distal bone stress distributions and mechanical parameters of the VLP (fracture gap movement, plate peak stresses, distal screw loads) were generally largest for the uniaxially loaded, embedded model (up to 250 % in individual screw loads) and smallest for the model with tied carpals and statically equivalent loads (<25 % for all parameters). Differences were greatly reduced if statically equivalent loads were applied, but subchondral stress peaks were absent without carpals. In conclusion, implementing realistic resultant forces and moments is more important than the exact articular load distribution, but carpal bones should be included if subchondral bone stresses are analyzed. In this case, a tie constraint may replace articular contact modelling with acceptable accuracy if statically equivalent loading is applied.
en
dc.language.iso
en
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dc.publisher
Elsevier
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dc.relation.ispartof
Journal of Biomechanics
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dc.rights.uri
http://creativecommons.org/licenses/by-nc/4.0/
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dc.subject
Biomechanical Phenomena
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dc.subject
Bone Plates
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dc.subject
Fracture Fixation, Internal
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dc.subject
Humans
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dc.subject
Distal radius fracture
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dc.subject
Finite element
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dc.subject
Radiocarpal joint
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dc.subject
Subchondral bone stress
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dc.subject
Volar plate
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dc.subject
Radius
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dc.subject
Radius Fractures
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dc.title
Articular contact vs. embedding: Effect of simplified boundary conditions on the stress distribution in the distal radius and volar plate implant loading
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dc.type
Article
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dc.type
Artikel
de
dc.rights.license
Creative Commons Attribution-NonCommercial 4.0 International
en
dc.rights.license
Creative Commons Namensnennung - Nicht kommerziell 4.0 International