Trans-Endplate Pedicle Pillar System in unstable spinal burst fractures: Design, technique, and mechanical evaluation

Chunfeng D Zhao, Michio Hongo, Brice Ilharreborde, Kristin D Zhao, Bradford L. Currier, Kai Nan An

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Background: Short-segment pedicle screw instrumentation (SSPI) is used for unstable burst fractures to correct deformity and stabilize the spine for fusion. However, pedicle screw loosening, pullout, or breakage often occurs due to the large moment applied during spine motion, leading to poor outcomes. The purpose of this study was to test the ability of a newly designed device, the Trans-Endplate Pedicle Pillar System (TEPPS), to enhance SSPI rigidity and decrease the screw bending moment with a simple posterior approach. Methods: Six human cadaveric spines (T11-L3) were harvested. A burst fracture was created at L1, and the SSPI (Moss Miami System) was used for SSPI fixation. Strain gauge sensors were mounted on upper pedicle screws tomeasure screw load bearing. Segmental motion (T12-L2) was measured under pure moment of 7.5 Nm. The spine was tested sequentially under 4 conditions: intact; first SSPI alone (SSPI-1); SSPI+TEPPS; and second SSPI alone (SSPI-2). Results: SSPI+TEPPS increased fixation rigidity by 41% in flexion/extension, 28% in lateral bending, and 37% in axial rotation compared with SSPI-1 (P

Original languageEnglish (US)
Article numbere0139592
JournalPLoS One
Volume10
Issue number10
DOIs
StatePublished - Oct 26 2015

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Spinal Fractures
screws
instrumentation
spine (bones)
methodology
Spine
Pedicle Screws
Rigidity
Bearings (structural)
Bryophyta
Weight-Bearing

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Trans-Endplate Pedicle Pillar System in unstable spinal burst fractures : Design, technique, and mechanical evaluation. / Zhao, Chunfeng D; Hongo, Michio; Ilharreborde, Brice; Zhao, Kristin D; Currier, Bradford L.; An, Kai Nan.

In: PLoS One, Vol. 10, No. 10, e0139592, 26.10.2015.

Research output: Contribution to journalArticle

Zhao, Chunfeng D ; Hongo, Michio ; Ilharreborde, Brice ; Zhao, Kristin D ; Currier, Bradford L. ; An, Kai Nan. / Trans-Endplate Pedicle Pillar System in unstable spinal burst fractures : Design, technique, and mechanical evaluation. In: PLoS One. 2015 ; Vol. 10, No. 10.
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