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

Foletti, J.M.; Martinez, Valentine; Haen, P.; Godio‐Raboutet, Yves; Guyot, Laurent; Thollon, Lionel

doi:10.1016/j.jormas.2018.11.003

Cited by 29 publications

(13 citation statements)

References 13 publications

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“…Since any potential damage was not observed in the MOBE, the procedure of calculating the destructive impact energy was omitted for it. Worth noting, similar outcomes to the current observations were also reported by Foletti et al, who achieved the value of even 12.25 J as the kinetic energy required to initiate the blowout fractures within the orbit [9].…”

Section: Discussionsupporting

confidence: 92%

“…As long as any controversy has not aroused around the essence of the buckling mechanism during previous studies [3][4][5][6], still, some descriptions of a sufficiently precise model of the hydraulic mechanism involving the set of intraorbital entities into cooperation (MOBOSE) are available in the literature. Until the works of Al-Sukhun et al [7], as well as Patel et al [6], and Foletti et al [8,9], other attempts were taken to model the hydraulic mechanism, but the role of the intraorbital tissues was omitted there. Nagasao et al built their models basing on the hydraulic pressure applied to the internal faces of the orbital walls [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Validation of Hydraulic Mechanism during Blowout Trauma of Human Orbit Depending on the Method of Load Application

Trzebiatowski

Kl̵osowski

Skorek

et al. 2021

Applied Bionics and Biomechanics

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The more we know about mechanisms of the human orbital blowout type of trauma, the better we will be able to prevent them in the future. As long as the buckling mechanism’s veracity is not in doubt, the hydraulic mechanism is not based on equally strong premises. To investigate the correctness of the hydraulic mechanism’s theory, two different methods of implementation of the hydraulic load to the finite element method (FEM) model of the orbit were performed. The intraorbital hydraulic pressure was introduced as a face load applied directly to the orbit in the first variant, while in the second one the load was applied to the orbit indirectly as a set of nodal forces transferred from the external surface of the eyeball via the intraorbital tissues to the orbital walls within the contact problem. Such an approach is aimed at a better understanding of the pattern for the formation of blowout fractures during the indirect load applied to the orbital bones. The nonlinear dynamic analysis of both numerical models showed that the potential fracture was observed in the second variant only, embracing a relatively large area: both medial and lower wall of the orbit. Interestingly, the pressure generated by the intraorbital entities transferred the energy of the impact to the orbital sidewalls mainly; thus, the nature of the mechanism known as the hydraulic was far from the expected hydraulic pressure. According to the eyeball’s deformation as well as the areas of the greatest Huber-Mises-Hencky (H-M-H) stress within the orbit, a new term of strut mechanism was proposed instead of the hydraulic mechanism as more realistic regarding the investigated phenomenon. The results of the current research may strongly influence the development of modern implantology as well as affect forensic medicine.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Validation of Hydraulic Mechanism during Blowout Trauma of Human Orbit Depending on the Method of Load Application

Trzebiatowski

Kl̵osowski

Skorek

et al. 2021

Applied Bionics and Biomechanics

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“…The powder hoppers (6) continuously feed the titanium powder (8) onto the start plate (10) inside the build platform. A mechanical raking blade (7) spreads the titanium powder evenly onto the build platform (9). Initially, a high-speed beam of electrons scans the titanium powder to preheat the powder to a sintered state.…”

Section: Implant Customization and Fabricationmentioning

confidence: 99%

“…Studies indicate that the young modulus of zygomatic bone is in the range from 10.4 GPa to 19.6 GPa, respectively [8]. Titanium implants are commonly used for zygomatic bony reconstruction because they provide reliable support for the orbital contents [9]. The first zygomatic implant reconstruction was developed by Branemark without grafting procedures for maxillectomized patients [10].…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of Complex Zygomatic Bone Defects Using Mirroring Coupled with EBM Fabrication of Titanium Implant

Moiduddin

Mian

Umer

et al. 2019

Metals

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Reconstruction of zygomatic complex defects is a surgical challenge, owing to the accurate restoration of structural symmetry as well as facial projection. Generally, there are many available techniques for zygomatic reconstruction, but they hardly achieve aesthetic and functional properties. To our knowledge, there is no such study on zygomatic titanium bone reconstruction, which involves the complete steps from patient computed tomography scan to the fabrication of titanium zygomatic implant and evaluation of implant accuracy. The objective of this study is to propose an integrated system methodology for the reconstruction of complex zygomatic bony defects using titanium comprising several steps, right from the patient scan to implant fabrication while maintaining proper aesthetic and facial symmetry. The integrated system methodology involves computer-assisted implant design based on the patient computed tomography data, the implant fitting accuracy using three-dimensional comparison techniques, finite element analysis to investigate the biomechanical behavior under loading conditions, and finally titanium fabrication of the zygomatic implant using state-of-the-art electron beam melting technology. The resulting titanium implant has a superior aesthetic appearance and preferable biocompatibility. The customized mirrored implant accurately fit on the defective area and restored the tumor region with inconsequential inconsistency. Moreover, the outcome from the two-dimensional analysis provided a good accuracy within 2 mm as established through physical prototyping. Thus, the designed implant produced faultless fitting, favorable symmetry, and satisfying aesthetics. The simulation results also demonstrated the load resistant ability of the implant with max stress within 1.76 MPa. Certainly, the mirrored and electron beam melted titanium implant can be considered as the practical alternative for a bone substitute of complex zygomatic reconstruction.

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“…Similar investigations of circumorbital mechanics were also performed on skull models of other nonhuman primates, e.g., that by Ross et al 17 . Only further works by Al Sukhun et al as well as Patel et al and Foletti et al did not omit the intraorbital soft tissues during the numerical analysis of blow-out fracture 18 – 21 .…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic analysis of the pure “buckling” mechanism during blow-out trauma of the human orbit

Trzebiatowski

Kl̵osowski

Skorek

et al. 2020

Sci Rep

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Considering the interplay between orbital bones and intraorbital soft tissues, commonly accepted patterns of the blow-out type of trauma within the human orbit require more thorough investigation to assess the minimal health-threatening impact value. Two different three-dimensional finite element method (FEM) models of the human orbital region were developed to simulate the pure “buckling” mechanism of orbital wall fracture in two variants: the model of orbital bone elements and the model of orbital bone, orbit and intraorbital tissue elements. The mechanical properties of the so-defined numerical skull fragment were applied to the model according to the unique laboratory tensile stress tests performed on small and fragile specimens of orbital bones as well as using the data available in the literature. The nonlinear transient analysis of the contact problem between bodies that differ substantially in terms of the Young’s modulus was carried out to investigate the interaction of different bodies within an instant injury. Potential damage areas were found within the lower orbital wall as well as the destructive load values for both FEM skull models (7,660 N and 8,520 N). Moreover, numerical simulations were validated by comparing them with computed tomography scans of real injuries.

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

Cited by 29 publications

References 13 publications

Validation of Hydraulic Mechanism during Blowout Trauma of Human Orbit Depending on the Method of Load Application

Validation of Hydraulic Mechanism during Blowout Trauma of Human Orbit Depending on the Method of Load Application

Reconstruction of Complex Zygomatic Bone Defects Using Mirroring Coupled with EBM Fabrication of Titanium Implant

Nonlinear dynamic analysis of the pure “buckling” mechanism during blow-out trauma of the human orbit

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