Effect of Carbon Fiber Reinforced-Polyetheretherketone (Cfr-Peek) Composite Rod for Pedicle Screw-Rod Semi-Rigid Fixation: A Finite Element Study

Malas, Anindya; Rana, Masud; Jain, Pushpdant; Majumdar, Sourav; Alok, Anupam; Pradhan, Rururaja; Biswas, Jayanta Kumar

doi:10.1615/intjmultcompeng.2021039785

Cited by 4 publications

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“…The range of motion change (θ) between the vertebrae is determined using the following steps. 33 1. Initially, three non-collinear nodes were selected in each plane of motion, lying on vertebrae.…”

Section: Namementioning

confidence: 99%

Comparison of novel stabilisation device with various stabilisation approaches: A finite element based biomechanical analysis

Jain

Khan

2022

Int J Artif Organs

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The treatment of spinal failure requires suitable instrumentation, which is based on numerous concepts such as rigid fixation, semi-rigid and dynamic stabilisation. In the present work, the biomechanical investigation of various fixation systems on the lumbar segment L2–L3 was performed employing finite element analysis. Different devices were considered: novel stabilisation device (NSD), rigid implant (RI) and existing dynamic stabilisation device (EDSD). All instrumented models were loaded with a condition of 400 N compressive force with a moment of 10Nm during flexion, extension, lateral bending and axial rotation. The results of range of motion change (RMC), von-Mises stress and strain were compared. The spinal biomechanics post instrumentation resulted significantly sensitive to the geometrical feature of the implant. The obtained results showed that NSD has intermediate motion characteristics in between dynamic stabilisation and rigid fixation. However, the optimum features of a novel stabilisation device for the treatment of spinal failure still need to be verified employing in-vivo, in-vitro studies.

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Section: Namementioning

confidence: 99%

Comparison of novel stabilisation device with various stabilisation approaches: A finite element based biomechanical analysis

Jain

Khan

2022

Int J Artif Organs

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“…On the same path recently carbon fibrereinforced (CFR) PEEK has gained popularity due to its semi-rigid characteristics in spinal implant application. 5,18 Recent literature have also proposed various semi-rigid and dynamic stabilization to address the different issues related to spinal sections and continuing. [19][20][21][22] Sanjay et al 23 have suggested to utilize the expandable pedicle screw in place of normal pedicle screw.…”

Section: Introductionmentioning

confidence: 99%

A biomechanical finite element study to assess the suitability of implantation on lumbar vertebrae L4-L5

Kamal

Jain

Biswas

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Instability in the spinal section along with the cases of degeneration is commonly cured by the pedicle screw fixation system. The present work aims at the identification of suitable instrumentation at the spinal segment L4-L5 through finite element method and compared with an intact spine. Vertebral section (L3- Coccyx) upper surface L3 were subjected to various axial compressive forces for the body weights of 17, 67, 100 and 167 kg under the different physiological motion conditions such as rotation, flexion, extension and bending. Considering Intact as 100% the calculated results of equivalent stress on IVD-L34, L45 and L5S are as 90%, 43% and 76% during flexion, for extension 118%, 26% and 108%, during bending 58%, 58% and 80% and during rotation 57%, 46%, 74% respectively are the lowest for 6 mm instrumentation as compared to other instrumentation model. It was also observed that the load on the cortical and annulus region were highest as compared to the cancellous and nucleus region. The results of the present study can contribute to explaining fracture and intervertebral disc replacement cases subjected to pedicle screw implantation.

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“…Compared to the cage fixation for ACDF, artificial disc replacement is more flexible [18,19]. The determining factor for the design optimisation of implants is stress in the implant and bone around the implant [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…FEM is an optimal tool for design patient-specific implant. Many scientists are utilising FEM to study the biomechanics of bone implants [20][21][22]. The patient's bone architecture and condition will determine fixation of cage [22,23].…”

Section: Introductionmentioning

confidence: 99%

Biomechanical analysis of a single-level customized cage screw fixation for anterior cervical discectomy and fusion in the cervical spine: an in-silico study

Kumar

2023

Biomed. Phys. Eng. Express

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The usual surgical choice of customized cage fixation is anterior cervical discectomy and fusion (ACDF) for cervical spondylosis with disc herniation. The safe and successful cage fixation for ACDF surgery benefits patients with cervical disc degenerative disease by easing their discomfort and regaining function. The cage prevents mobility between the vertebrae by using cage fixation to anchor the neighbouring vertebrae. The goal of the current study is to develop a customized cage-screw implant for single-level cage fixation at C4-C5 level of the cervical spine (C2-C7). The Finite Element Analysis (FEA) is performed for the intact and implanted cervical spine and analysed the flexibility, stress of the implant and implant adjacent bone during three physiological loading conditions being analysed. Lower surface of the C7 vertebrae is fixed and 50 N compressive force with 1 Nm moment are applied on the C2 vertebrae for simulated lateral bending, axial rotation and flexion-extension. The flexibility is decreased at single level of fixation (C4-C5 level) by 64% to 86%, as compared to natural cervical spine. The flexibility is increased 3% to 17% at the nearest levels of fixation. The maximum Von Mises stress in PEEK cage varies from 24 to 59 MPa and for Ti-6Al-4V screw the stress varies from 84MPa to 121MPa which are far below the yield stress of PEEK (95MPa) and Ti-6Al-4V (750MPa).

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Effect of Carbon Fiber Reinforced-Polyetheretherketone (Cfr-Peek) Composite Rod for Pedicle Screw-Rod Semi-Rigid Fixation: A Finite Element Study

Cited by 4 publications

References 0 publications

Comparison of novel stabilisation device with various stabilisation approaches: A finite element based biomechanical analysis

Comparison of novel stabilisation device with various stabilisation approaches: A finite element based biomechanical analysis

A biomechanical finite element study to assess the suitability of implantation on lumbar vertebrae L4-L5

Biomechanical analysis of a single-level customized cage screw fixation for anterior cervical discectomy and fusion in the cervical spine: an in-silico study

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