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Pull-out strength of pedicle hooks with fixation screws: influence of screw length and angulation.

Authors
  • Berlemann, U
  • Cripton, P A
  • Rincon, L
  • Nolte, L P
  • Schläpfer, F
Type
Published Article
Journal
European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
Publication Date
Jan 01, 1996
Volume
5
Issue
1
Pages
71–73
Identifiers
PMID: 8689420
Source
Medline
License
Unknown

Abstract

The pull-out force of thoracic spinal pedicle hooks secured by long fixation screws engaging the posterior portion of the vertebral endplate was measured. The performance of these hooks was compared with that of hooks using a shorter screw and different screw orientation such that the vertebral endplates were not perforated. The longer and differently angulated screws, engaging the endplate, significantly enhanced the fixation potential of the hooks.

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