Research ArticleBiomechanics

Biomechanics of an Expandable Lumbar Interbody Fusion Cage Deployed Through Transforaminal Approach

MICHAEL CONTI MICA, LEONARD I. VORONOV, GERARD CARANDANG, ROBERT M. HAVEY, BARTOSZ WOJEWNIK and AVINASH G. PATWARDHAN
International Journal of Spine Surgery August 2018, 12 (4) 520-527; DOI: https://doi.org/10.14444/5063

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Figures

  • Figure 1
    Figure 1

    Lumbar spine (L1-5) experimental setup showing compressive follower preload cables and guides.

  • Figure 2
    Figure 2

    Fluoroscopic images of protocol steps: (A) Intact spine. (B) Standalone anterior lumbar interbody fusion. (C) Anterior lumbar interbody fusion + bilateral pedicle screws. (D) Standalone expandable transforaminal lumbar interbody fusion. (E) Expandable transforaminal lumbar interbody fusion + bilateral pedicle screws.

  • Figure 3
    Figure 3

    View of inferior endplates and implant placements after sectioning of intervertebral disc. (A) Expandable transforaminal lumbar interbody fusion cage showing the posterior approach. (B) Anterior lumbar interbody fusion cage showing the anterior approach.

  • Figure 4
    Figure 4

    Expandable transforaminal lumbar interbody fusion cage surgical stages. (A) Interbody cage during deployment. (B) Cage fully deployed. (C) Cage expanded. (D) Final step.

  • Figure 5
    Figure 5

    Range of motion (ROM) of anterior lumbar interbody fusion (ALIF) and the expandable transforaminal lumbar interbody fusion (ELIF) devices in both implanted segments (L2-3 and L3-4) in flexion-extension without preload.

  • Figure 6
    Figure 6

    Range of motion (ROM) of anterior lumbar interbody fusion (ALIF) and the expandable transforaminal lumbar interbody fusion (ELIF) devices in both implanted segments (L2-3 and L3-4) in flexion-extension under 400 N follower preload.

  • Figure 7
    Figure 7

    Range of motion (ROM) of anterior lumbar interbody fusion (ALIF) and expandable transforaminal lumbar interbody fusion (ELIF) devices in both implanted segments (L2-3 and L3-4) in lateral bending.

  • Figure 8
    Figure 8

    Range of motion (ROM) of anterior lumbar interbody fusion (ALIF) and expandable transforaminal lumbar interbody fusion (ELIF) devices in both implanted segments (L2-3 and L3-4) in axial rotation.

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Biomechanics of an Expandable Lumbar Interbody Fusion Cage Deployed Through Transforaminal Approach
MICHAEL CONTI MICA, LEONARD I. VORONOV, GERARD CARANDANG, ROBERT M. HAVEY, BARTOSZ WOJEWNIK, AVINASH G. PATWARDHAN
International Journal of Spine Surgery Aug 2018, 12 (4) 520-527; DOI: 10.14444/5063
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