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Journal of Stomatology Oral and Maxillofacial Surgery
Volume 120, n° 2
pages 91-94 (avril 2019)
Doi : 10.1016/j.jormas.2018.11.003
Received : 16 August 2018 ;  accepted : 11 November 2018
Original Articles

Finite element analysis of the human orbit. Behavior of titanium mesh for orbital floor reconstruction in case of trauma recurrence
 

J.M. Foletti a, , V. Martinez b , P. Haen c , Y. Godio-Raboutet b , L. Guyot d , L. Thollon b
a Aix Marseille université, AP–HM, IFSTTAR, LBA, hôpital de la Conception, service de chirurgie maxillo-faciale, 13015 Marseille, France 
b Aix Marseille université, IFSTTAR, LBA, 13015 Marseille, France 
c Aix Marseille université, HIA Laveran, service de chirurgie maxillo-faciale, 13013 Marseille, France 
d AP–HM, CNRS, EFS, hôpital de la Conception, service de chirurgie maxillo-faciale, 13015 Marseille, France 

Corresponding author. Aix Marseille université, IFSTTAR, LBA UMR_T24, faculté de médecine – Secteur Nord, boulevard Pierre-Dramard, 13916 Marseille cedex 20, France.Aix Marseille universitéIFSTTARLBA UMR_T24faculté de médecine – Secteur Nordboulevard Pierre-DramardMarseille cedex 2013916France
Abstract
Introduction

The authors’ main purpose was to simulate the behavior of a titanium mesh implant (TMI) used to reconstruct the orbital floor under the stress of a blunt trauma.

Materials and methods

The orbital floor of a previously validated finite element model (FEM) of the human orbit was numerically fractured and reconstructed by a simplified TMI. Data from a CT scan of the head were computed with MICMICS (Materialise, Louvain, Belgium) software to re-create the skull's geometry. The meshing production, the model's properties management and the simulations of blunt traumas of the orbit were conducted on HYPERWORKS® software (Altair Engineering, Detroit, MI, USA). Some of the elements of the orbital floor were selected and removed to model the fracture; these elements were duplicated, their characteristics being changed by those of titanium to create a TMI covering this fracture. A 3D FEM composed of 640,000 elements was used to perform 21 blunt trauma simulations on the reconstructed orbit.

Results

In 90.4% (19/21) of the tests conducted, the TMI, whether free from any bony attachment or screwed to the orbital rim, has tended to move in the orbit and/or to deform.

Discussion

In the event of traumatic recurrence, which is not rare, TMIs may deform in a “blow-in” motion and threaten intra-orbital structures.

The full text of this article is available in PDF format.

Keywords : Finite element analysis, Maxillofacial, Trauma recidivism, Orbit, Biomechanics




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