Biomechanical effect of C5-C6 intervertebral disc degeneration on the human lower cervical spine (C3-C7): a finite element study

Rahman, Waseem ur; Jiang, Wei; Zhao, Fulin; Li, Zhijun; Wang, Guohua; Yang, Guixia

doi:10.1080/10255842.2022.2089026

Cited by 3 publications

(3 citation statements)

References 52 publications

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“…23,24 These parameters are recommended by clinical finite element model standards and are consistent with the recommended specifications for calculating solid mechanics verification by the ASME Standards Committee. 18,25 The material characteristics of the hybrid model are shown in Table 2, and the modeling process is shown in Figure 4.…”

Section: Methodsmentioning

confidence: 99%

“…The facet joint is composed of two parts of cartilage with a spacing of 0.5 mm, and their contact is defined as frictionless hard contact. 18 Five important ligaments were selected, including the anterior longitudinal ligament (ALL 15), the interspinous ligament (ISL 15), the capsular ligament (CL 40), the posterior longitudinal ligament (PLL 15), and the ligamentum flavum (LF 15), which were also established as tension-only rod elements. [19][20][21][22] The material parameters and mesh types of each part in the finite element model are shown in Table 1.…”

Section: Development Of Fe Cervical Spine Modelmentioning

confidence: 99%

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Comparison of the effects of different artificial discs on hybrid surgery: A finite element analysis

Jiang,

Zhao,

Rahman

et al. 2023

Proc Inst Mech Eng H

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In recent years, artificial cervical discs have been used in intervertebral disc replacement surgery and hybrid surgery (HS). The advantages and disadvantages of different artificial cervical discs in artificial cervical disc replacement surgery have been compared. However, few scholars have studied the biomechanical effects of various artificial disc prostheses on the human cervical spine in HS which include the Anterior Cervical Discectomy and Fusion (ACDF) and Cervical Disc Arthroplasty (CDA). This study compared the biomechanical behavior of Mobi-C and Prestige LP in the operative and adjacent segments during two-level hybrid surgery. A three-dimensional finite element model of C2–C7 was first established and validated. Subsequently, clinical surgery was then simulated to establish a surgical model of anterior cervical fusion at the C4–C5 level. Mobi-C and Prestige-LP artificial disc prostheses were implanted at the C5–C6 level to create two hybrid models. All finite element models were fixed on the lower endplate of the C7 vertebra and subjected to a load of 73.6 N and different directions of 1 Nm torque on the odontoid process of the C2 vertebra to simulate human flexion, extension, lateral bending, and axial rotation. This paper compares the ROM, intervertebral pressure, and facet joint force after hybrid surgery with the intact model. The results show that compared with Prestige LP, Mobi-C can improve ROM of the replacement segment and compensate for the intervertebral pressure of the adjacent segment more effectively, but the facet joint pressure of the replacement segment may be higher.

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Section: Methodsmentioning

confidence: 99%

Section: Development Of Fe Cervical Spine Modelmentioning

confidence: 99%

Comparison of the effects of different artificial discs on hybrid surgery: A finite element analysis

Jiang,

Zhao,

Rahman

et al. 2023

Proc Inst Mech Eng H

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“…The current research developed a FE human cervical spine model (C2-C7) based on our prior work. 15 Prestige LP and Mobi-C prostheses were implanted at segments C5-C6 for single arthroplasty and C4-C5 and C5-C6 for double arthroplasty. This paper aims to evaluate the biomechanical effects of single-and double-level cervical disc (''Prestige LP and Mobi-C'') arthroplasty using the FE model of the human cervical spine.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical analysis of single- and double-level cervical disc arthroplasty using finite element modeling

Rahman

Jiang

Zhao

et al. 2022

Proc Inst Mech Eng H

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Recently, many different types of artificial discs have been introduced to persevere the biomechanical behavior of the cervical spine. This study compares the biomechanical behavior of single- and double-level cervical disc arthroplasty, that is “Prestige LP and Mobi-C” on the index and adjacent segment. A three-dimension finite element model of C2-C7 was developed and validated. In single-level prostheses, the Prestige LP or Mobi-C was implanted in the segment C5-C6, while the double-level arthroplasty was integrated at both segments C4-C5 and C5-C6 in the FE model. The intact FE and prosthesis-modified models were constrained from the inferior endplate of the vertebra C7 and applied a compressive load of 73.6 N with a moment load of 1 Nm on the odontoid process of the vertebra C2 to produce flexion/extension, lateral bending, and axial rotation. The prosthesis-modified model’s range of motion and intradiscal pressure were determined and compared to the intact model. Also examined the impact of the prostheses on the stress at the bone-implant interface. The range of motion of the implanted segments in both single- and double-levels arthroplasty was increased while that of the adjacent segment of implanted segments decreased. The intradiscal pressure in both levels of arthroplasty was greater than in the intact model. In conclusion, Mobi-C’s cervical prostheses could better preserve the normal range of motion and maintain intradiscal pressure than the Prestige LP.

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Case series study and finite element analysis of a new cervicothoracic fixation device

Li,

Du,

Zhu

et al. 2024

BMC Musculoskelet Disord

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Objective To introduce a specialized device designed for the fixation of the cervical-thoracic spine and describe its surgical installation, finite element analysis, and clinical outcomes. Methods A finite element model of the C 6 -T 1 segment was developed and validated, and simulations of subtotal resection of anterior cervical vertebrae, artificial vertebrae placement, and titanium plate fixation were performed. The model was subjected to a 75 N load to simulate the weight of the head and a 1 N·m force to simulate flexion, lateral bending, and axial rotation. The analysis focused on range of motion, total stress, stress in the artificial vertebrae, and stress in the device. The clinical outcomes were evaluated in a retrospective case series of 140 patients with cervical spine fractures. Results Under the same loading conditions, the maximum stresses on specialized anatomical and biomechanical devices for the fixation of the cervicothoracic segment of the spine during neutral, forwards flexion, backwards extension, left lateral bending, right lateral bending, left rotation, right rotation and other working conditions were 25.097 MPa, 149.480 MPa, 64.150 MPa, 67.804 MPa, 72.754 MPa, and 117.98 MPa, respectively. And, the maximum ROMs were 2.230 mm, 5.585 mm, 4.682 mm, 3.184 mm, 3.061 mm, 4.451 mm, and 4.645 mm. Compared with those in the preoperative period, the patients’ CL, OPCL, UCL, LCL, UROM, LROM, VAS score, NDI score, JOA score, intervertebral space height at the injured segment, cervical anterior kyphosis angle, Cobb angle, vertebral displacement, ASIA grade, fracture classification, and vertebral displacement improved ( P < 0.05). Sixty-two patients had dysphagia, and 3 patients experienced leakage of cerebrospinal fluid. Conclusion The design of the new cervicothoracic internal fixation device conforms to the anatomical structure of the cervicothoracic spine, which can provide immediate stability, better screw placement and adequate bone grafting, and reduce the risk of complications. Despite some disadvantages, it is a good device for segmental fixation of the cervical and thoracic spine.

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Biomechanical effect of C5-C6 intervertebral disc degeneration on the human lower cervical spine (C3-C7): a finite element study

Cited by 3 publications

References 52 publications

Comparison of the effects of different artificial discs on hybrid surgery: A finite element analysis

Comparison of the effects of different artificial discs on hybrid surgery: A finite element analysis

Biomechanical analysis of single- and double-level cervical disc arthroplasty using finite element modeling

Case series study and finite element analysis of a new cervicothoracic fixation device

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