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Research ArticleBiomechanics

Endplate Deformation Due to Open and Strutted Intervertebral Devices

ANTONIO VALDEVIT, ANNA KEDZIERSKA, MICHELLE B. GALLAGHER, JENNIFER M. SCHNEIDER and PETER F. ULLRICH
International Journal of Spine Surgery December 2019, 13 (6) 522-530; DOI: https://doi.org/10.14444/6070
ANTONIO VALDEVIT
1Health Sciences Practice Group, SEA Limited, Columbus, Ohio
PhD
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ANNA KEDZIERSKA
2Department of Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey
MS
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MICHELLE B. GALLAGHER
3Titan Spine LLC, Mequon, Wisconsin
MS
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JENNIFER M. SCHNEIDER
3Titan Spine LLC, Mequon, Wisconsin
MS
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PETER F. ULLRICH
3Titan Spine LLC, Mequon, Wisconsin
MD
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  • Article
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Figures

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    Figure 1

    Schematic representation of hypothesized endplate deformation due to implant loading along the vertebral periphery of open and strutted cage designs.

  • Figure 2
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    Figure 2

    Left—No strut implant design (ie, open implant). Right—Implant design with a central strut (ie, strutted implant).

  • Figure 3
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    Figure 3

    Experimental set up to measure endplate bulging during cyclic loading.

  • Figure 4
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    Figure 4

    Graphical representation of an exponential function used for fitting of endplate and vertebra-implant deformation data under cyclic loading.

  • Figure 5
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    Figure 5

    Fitted exponential curves to the open and strutted implant endplate motion.

  • Figure 6
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    Figure 6

    Resulting K value from the exponential regression for implants with and without a central support strut.

  • Figure 7
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    Figure 7

    Resulting half-life calculation from the exponential regression for implants with and without a central support strut.

  • Figure 8
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    Figure 8

    Resulting span calculation from the exponential regression for implants with and without a central support strut.

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International Journal of Spine Surgery
Vol. 13, Issue 6
1 Dec 2019
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Endplate Deformation Due to Open and Strutted Intervertebral Devices
ANTONIO VALDEVIT, ANNA KEDZIERSKA, MICHELLE B. GALLAGHER, JENNIFER M. SCHNEIDER, PETER F. ULLRICH
International Journal of Spine Surgery Dec 2019, 13 (6) 522-530; DOI: 10.14444/6070

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Endplate Deformation Due to Open and Strutted Intervertebral Devices
ANTONIO VALDEVIT, ANNA KEDZIERSKA, MICHELLE B. GALLAGHER, JENNIFER M. SCHNEIDER, PETER F. ULLRICH
International Journal of Spine Surgery Dec 2019, 13 (6) 522-530; DOI: 10.14444/6070
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Keywords

  • endplate deformation
  • implant
  • dynamic strain
  • dynamic bone remodeling
  • osteogenesis

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