Chinese Journal of Clinical Anatomy >
Finite element analysis of the throwing fracture of humerus fixed with locking compression plates and interlocking intramedullary nails
Received date: 2014-07-11
Online published: 2015-04-21
Objective To explore and compare the biomechanical properties of the throwing fracture of humerus fixed with locking compression plates and interlockingintramedullary nails using finite element analysis, and therefore to provide theoretic reference for clinic application. Methods 3D FE models of the throwing fracture of humerus fixed with locking compression plates in anterolateral and posterior, retrograde and antegrade interlocking intramedullary nails were developed. Each mode was tested in axial compression, bending and anticlockwise torsion. The von-Mises and total deformation of internal fixities, humerus and fracture end were used to compare. Results The maximum stress of the anterolateral plate placement was smaller than the posterior plate placement. Under compression loading, the maximum stress of the retrograde intramedullary nail was smaller than the antegrade intramedullary nail group while the opposite results were obtained under the bending and anticlockwise torsion loadings. The maximum deformation of humerus of locking compression plate groups was smaller than the intramedullary nail groups, the anterolateral plate group was greater than the posterior group, and the antegrade intramedullary nail group was greater than the retrograde group. The stress distribution of fracture end of the locking compression plate groups was more uniform than the interlocking nail groups and had a larger maximum stress. Conclusions The throwing fracture of humerus fixed with locking compression plate is more stable and the stress distribution is more uniform than that fixed interlocking intramedullary nail. Locking compression plate in posterior placement is more stable than the anterolateral placement but have a larger maximum stress. Fixation with retrograde intramedullary nail is more stable than that with the antegrade intramedullary nail.
ZHENG Xiang , ZHANG Ying , CHAN Yong-Xin , XIE Hui-Bin , GUO Xiao-Ze , SHU Chang-Rong . Finite element analysis of the throwing fracture of humerus fixed with locking compression plates and interlocking intramedullary nails[J]. Chinese Journal of Clinical Anatomy, 2015 , 33(2) : 213 -217 . DOI: 10.13418/j.issn.1001-165x.2015
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