A comparative finite element analysis of artificial intervertebral disc replacement and pedicle screw fixation of the lumbar spine

Biswas, Jayanta Kumar; Malas, Anindya; Majumdar, Sourav; Rana, Masud

doi:10.1080/10255842.2022.2039130

Cited by 12 publications

(9 citation statements)

References 36 publications

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“…The core was constrained to the lower endplate and was allowed to slide along the upper endplate. 29,30 The endplate-vertebra interfaces were modelled with CONTA174 and TARGE170 contact elements. A contact pair was set to 'bonded' for contact between endplate and vertebrae.…”

Section: Materials Properties and Boundary Conditionsmentioning

confidence: 99%

The influence of the viscoelastic property of polycarbonate urethane as an artificial disc core material under various physiological motions at the L4–L5 level

Jacob

Prakash

2022

Int J Artif Organs

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Intervertebral disc (IVD) degeneration is one of the musculoskeletal disorders due to the Degenerative Disc Disease (DDD), that cause low back pain (LBP) and leads to a reduced range of motion. Spinal fusion and arthroplasty are the other surgical procedures that could replace the disc affected by DDD against artificial disc replacement (ADR). This study aims to analyse the biomechanical behaviour of proposed core material as Polycarbonate Urethane (PCU) in the L4–L5 lumbar segment for ADR with Ti-6Al-4V and Co-28Cr-6M as endplate materials and compare it to the performance of an ultra-high molecular weight polyethylene (UHMWPE) core. Finite element methods have been approached to measure the overall stress distribution along with other physiological motions like Flexion (FLEX), Extension (EXT), Axial rotation (AR) and Lateral bending (LB), respectively. Preload of 450 N compressive load, 8 N-m for Flex, 6 N-m for EXT, 6 N-m for AR and 4 N-m for LB are applied. It could be concluded that Ti-6Al-4V – PCU and Co-28Cr-6M – PCU is the best composition for the ADR for the L4–L5 level.

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Section: Materials Properties and Boundary Conditionsmentioning

confidence: 99%

The influence of the viscoelastic property of polycarbonate urethane as an artificial disc core material under various physiological motions at the L4–L5 level

Jacob

Prakash

2022

Int J Artif Organs

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“…14,15 Studies use in vitro, in vivo, and finite element analysis (FEA) models to understand cervical spine mechanics. [16][17][18][19][20][21][22][23][24] The in-vitro model testing on human cadavers has limitations of structural, anatomical, and demographic data losses with variations in physical properties. 17 The in-vivo studies provide insights into muscle force generation, cervical spine kinematics, and IVD degeneration mechanics during neck motion.…”

Section: Introductionmentioning

confidence: 99%

“…21,22 Many studies in cervical biomechanics concentrated on IVD stresses, IVD replacement, cage insertion into IVD, and analysis. [20][21][22][23][24][25][26][27] Similarly, researchers have utilized electromyography techniques to record discomfort in the cervical muscles like sternocleidomastoid (SCM) and trapezius pars descendens (TRP) by correlating flexion angles during various tasks, postures, and natural movements. [28][29][30][31] These studies have shown higher muscle activity concentrated at the neck during flexed posture than in neutral posture.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical analysis of cervical spine (C2–C7) at different flexed postures

Dandumahanti,

Subramaniyam

2024

Int J Artif Organs

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Musculoskeletal diseases are often related with postural changes in the neck region that can be caused by prolonged cervical flexion. This is one of the contributing factors. When determining the prevalence, causes, and related risks of neck discomfort, having a solid understanding of the biomechanics of the cervical spine (C1–C7) is absolutely necessary. The objective of this study is to make predictions regarding the intervertebral disc (IVD) stress values across C2–C7 IVD, the ligament stress, and the variation at 0°, 15°, 30°, 45°, and 60° of cervical neck angle using finite element analysis (FEA). In order to evaluate the mechanical properties of the cervical spine (particularly, C2–C7), this investigation makes use of computed tomography (CT) scans to develop a three-dimensional FEA model of the cervical spine. A preload of 50 N compression force was applied at the apex of the C2 vertebra, and all degrees of freedom below the C7 level were constrained. The primary objective of this investigation is to assess the distribution of von Mises stress within the IVDs and ligaments spanning C2–C7 at various flexion angles: 0°, 15°, 30°, 45°, and 60°, utilizing FEA. The outcomes derived from this analysis were subsequently compared to previously published experimental and FEA data to validate the model’s ability to replicate the physiological motion of the cervical spine across different flexion angles.

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“…This design aids in uniformly distributing the weight between the implant and the surrounding bone, lowering the possibility of sinking and increasing the likelihood of fusion [11,12]. Despite the fact that many researchers have explored composites compatible with it, PEEK is one of the most biocompatible composite biomaterials for bone implants [13,14]. The subsidence rates on comparison with titanium (Ti) peek cages have been reported to be lower, the reason attributing to its low modulus of elasticity and biomechanical similarity to cortical bone [12].…”

Section: Introductionmentioning

confidence: 99%

“…This remains true even though the clinical and radiological outcomes of standard titanium (Ti) or peek fusion cage designs used in ACDF being comparable [12,15]. PEEK cage decreases infections at the neighbouring level, according to several studies [16,17]. Compared to the cage fixation for ACDF, artificial disc replacement is more flexible [18,19].…”

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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A comparative finite element analysis of artificial intervertebral disc replacement and pedicle screw fixation of the lumbar spine

Cited by 12 publications

References 36 publications

The influence of the viscoelastic property of polycarbonate urethane as an artificial disc core material under various physiological motions at the L4–L5 level

The influence of the viscoelastic property of polycarbonate urethane as an artificial disc core material under various physiological motions at the L4–L5 level

Biomechanical analysis of cervical spine (C2–C7) at different flexed postures

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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