Subject-specific finite element analysis of a lumbar cage produced by electron beam melting.
The aim of this study was the analysis of the mechanical behaviour of a partially porous lumbar custom-made cage by means of a subject-specific finite element analysis (FEA). The cage, made of Ti6Al4V ELI alloy, was produced via electron beam melting (EBM) process and surgically implanted in a femal...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 57; no. 12; pp. 2771 - 2782 |
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| Autores principales: | , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Dec2019
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=140034799&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 140034799 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Dec2019 vid: 57 iid: 12 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 140034799 140034799 NLM31741290 10.1007/s11517-019-02078-8 NLM31741290 140034799 ppf: 2771 ppct: 11 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Subject-specific finite element analysis of a lumbar cage produced by electron beam melting. aug: au: Epasto, Gabriella Distefano, Fabio Mineo, Rosalia Guglielmino, Eugenio affil: Department of Engineering, University of Messina, Contrada di Dio, Vill. Sant'Agata, 98166, Messina, Italy sug: subj: Lumbar Vertebrae Physiology Spinal Fusion Equipment and Supplies Female Spinal Fusion Methods Titanium Range of Motion Physiology Electrons Finite Element Analysis Internal Fixators Prostheses and Implants Kinematics Physiology Stress, Mechanical Physics Middle Age Clinical Assessment Tools Questionnaires Middle Aged: 45-64 years Female ab: The aim of this study was the analysis of the mechanical behaviour of a partially porous lumbar custom-made cage by means of a subject-specific finite element analysis (FEA). The cage, made of Ti6Al4V ELI alloy, was produced via electron beam melting (EBM) process and surgically implanted in a female subject, 50 years old. The novelty of this study was the customized design of the cage and of its internal structure, which is impossible to obtain with the traditional production techniques. The 3D model of the spine was obtained from the computed tomography (CT) of the patient. Moreover, high-resolution industrial CT was also used to reconstruct a 3D model of the cage, with its real (as-produced) features, such as superficial roughness, morphology of the bulk and of the porous structure. The workflow was divided in several steps: the main finite element analyses were non-linear and quasi-static regarding: the rhombic dodecahedron (RD) unit cell of the porous structure; the device; the whole L4-L5 motion segment with the implanted cage. Stress distribution was calculated under compression load for all models. For the RD unit cell, the maximum stress appeared at the connected cross nodes, where notch effect was present. For the cage subjected to a load of 1 kN, the porous structure did not present any functional failure. For the whole biomechanical system subjected to a physiological load of 360 N, the calculated stress in the bone was smaller than its yield strength value. On the axial view, a zone with higher compressive stresses was present on the L5 vertebral body. This was due to the contact stress between the cage and the vertebra. From the comparison between FE results and the CT images of the spine, bone remodelling was supposed, with the formation of new bone. Graphical abstract Workflow showing the phases of the research. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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