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In vitro biomechanical evaluation of a monocoque plate-spacer construct for cervical open-door laminoplasty

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  • Yukoh Ohara
  • Takeshi Hara
  • Alejandro A Espinoza Orías
  • Satoshi Tani
  • Nozomu Inoue
  • Junichi Mizuno

Abstract

Purpose: To evaluate biomechanical differences between two surgical procedures for cervical open-door laminoplasty using human cadaveric spines. Methods: Twenty-four cervical vertebrae (C4-C6) from eight fresh-frozen human cervical spines were subjected to mechanical testing after being instrumented for open-door laminoplasty using a newly designed plate-spacer device with a monocoque structure (plate-spacer group; n = 12) or by conventional miniplate-alone fixation (miniplate group; n = 12). Cantilever bending testing was performed by applying a compressive load in the cranio-caudal direction to the base of the spinous process of the reconstructed laminar arch constructs until failure and strength and stiffness of the laminar arch were determined. The results are presented as mean ± standard deviation. Results: The plate-spacer group was approximately twice as strong as the miniplate group (27.6 ± 16.5 N vs. 13.5 ± 7.3 N, p

Suggested Citation

  • Yukoh Ohara & Takeshi Hara & Alejandro A Espinoza Orías & Satoshi Tani & Nozomu Inoue & Junichi Mizuno, 2018. "In vitro biomechanical evaluation of a monocoque plate-spacer construct for cervical open-door laminoplasty," PLOS ONE, Public Library of Science, vol. 13(10), pages 1-11, October.
    • Handle: RePEc:plo:pone00:0204147
    DOI: 10.1371/journal.pone.0204147
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