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Research ArticleTotal Disc Replacement

Biomechanical Analysis of the Cervical Spine Following Disc Degeneration, Disc Fusion, and Disc Replacement: A Finite Element Study

ANUP A. GANDHI, NICOLE M. GROSLAND, NICOLE A. KALLEMEYN, SWATHI KODE, DOUGLAS C. FREDERICKS and JOSEPH D. SMUCKER
International Journal of Spine Surgery December 2019, 13 (6) 491-500; DOI: https://doi.org/10.14444/6066
ANUP A. GANDHI
1Department of Biomedical Engineering, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
2Center for Computer Aided Design, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
PhD
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NICOLE M. GROSLAND
1Department of Biomedical Engineering, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
3Department of Orthopaedics and Rehabilitation, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
PhD
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NICOLE A. KALLEMEYN
1Department of Biomedical Engineering, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
2Center for Computer Aided Design, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
PhD
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SWATHI KODE
1Department of Biomedical Engineering, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
2Center for Computer Aided Design, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
PhD
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DOUGLAS C. FREDERICKS
3Department of Orthopaedics and Rehabilitation, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
BS
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JOSEPH D. SMUCKER
3Department of Orthopaedics and Rehabilitation, University of Iowa Hospitals and Clinics, The University of Iowa, Iowa City, Iowa
MD
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    Figure 1

    Three-dimensional finite element (FE) models, (left to right): intact, single-level Bryan, single-level prestige, 2-level Bryan, 2-level Prestige.

  • Figure 2
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    Figure 2

    Three-dimensional finite element (FE) model of the Bryan cervical disc (left) and Prestige LP disc (right).

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    Figure 3

    Section view of the Bryan (left) and Prestige LP (right) discs showing the different contact pairs.

  • Figure 4
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    Figure 4

    Comparison of range of motion in all 6 directions between intact (nondegenerative), single-level degenerative, and 2-level degenerative models.

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    Figure 5

    Percentage change in motion after fusion and arthroplasty with Bryan and Prestige LP with respect to motion of the degenerated model (C5-C6 level).

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    Figure 6

    Percentage change in motion for 2-level TDR, hybrid, and 2-level fusion models.

  • Figure 7
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    Figure 7

    Percentage change in disc stresses after single-level disc replacement (Bryan and Prestige LP) and fusion in comparison to the degenerative model at the cranial and caudal levels.

  • Figure 8
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    Figure 8

    Percentage change in disc stresses after 2-level disc replacement (Bryan and Prestige LP), disc replacement adjacent to fusion, and 2-level fusion in comparison to the 2-level degenerative model at the cranial and caudal levels.

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International Journal of Spine Surgery
Vol. 13, Issue 6
1 Dec 2019
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Biomechanical Analysis of the Cervical Spine Following Disc Degeneration, Disc Fusion, and Disc Replacement: A Finite Element Study
ANUP A. GANDHI, NICOLE M. GROSLAND, NICOLE A. KALLEMEYN, SWATHI KODE, DOUGLAS C. FREDERICKS, JOSEPH D. SMUCKER
International Journal of Spine Surgery Dec 2019, 13 (6) 491-500; DOI: 10.14444/6066

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Biomechanical Analysis of the Cervical Spine Following Disc Degeneration, Disc Fusion, and Disc Replacement: A Finite Element Study
ANUP A. GANDHI, NICOLE M. GROSLAND, NICOLE A. KALLEMEYN, SWATHI KODE, DOUGLAS C. FREDERICKS, JOSEPH D. SMUCKER
International Journal of Spine Surgery Dec 2019, 13 (6) 491-500; DOI: 10.14444/6066
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More in this TOC Section

  • Single-Level Total Disc Replacement: Mid- to Long-Term Outcomes
  • Single-Level Total Disc Replacement: Index-Level and Adjacent-Level Revision Surgery Incidence, Characteristics, and Outcomes
  • Anterior Cervical Foraminotomy for Radiculopathy After Cervical Artificial Disc Replacement: Technique Description and Case Report
Show more Total Disc Replacement

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Keywords

  • TDR
  • arthroplasty
  • cervical spine
  • Biomechanics
  • fusion
  • finite element analysis
  • disc replacement adjacent to fusion
  • Bryan disc
  • Prestige LP disc
  • adjacent segment

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