Modeling Of Fractured Clavicles And
Reconstruction Plates Using CAD, Finite Element
Analysis And Real Musculoskeletal Forces Input
Author(s)
M. Cronskär & M. Bäckström
Abstract
This study focuses on the treatment options for clavicle fractures, more
specifically the cases with a need for internal fixation: non-unions and some
complex fractures. Enhancing the understanding of the loading of the bone and
fixation device enables treatment options to be improved. The aim of the study
was to develop a method for the realistic simulation of stresses and
displacements in the bone and fixation device and to use this method to make
comparisons between a conventional reconstruction plate and a customized plate,
designed from patient-specific computed tomography (CT) data. In an earlier
study, a finite element (FE) mesh of the clavicle geometry was created from CT
data, subjected to muscle forces and other boundary conditions from a multibody
musculoskeletal model and imported into the FE solver. In this study, a solid 3D
model of the same clavicle geometry was created and the mesh was replaced by
the solid model to make the FE-model more suitable for the comparison of
different plates. An LCP Reco-Plate 3.5 straight, 6 holes (by Synthes) was
compared with a customized plate which was designed to follow the anatomy of
the bone. The LCP-Reco plate has tapered reconstruction segments throughout
the plate to allow for the plate reshaping during surgery. The customized plate
was designed without such segments and with a lower width than the LCP plate.
The two different plates showed stresses and displacements of similar
magnitudes. The customized plate had a more even stress distribution while the
LCP plate had higher stress concentrations in the middle of the plate and on the
edges of the tapered reconstruction segments. To the authors’ best knowledge,
this is the first FE model of a clavicle bone with plate and it may, upon further
development, serve as a useful instrument for improved clavicle fixation.
Keywords: clavicle, finite element analysis, CAD, modeling, bone plate.
Keywords
Keywords: clavicle, finite element analysis, CAD, modeling, bone plate.
Related Book
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