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Twelfth thoracic-first lumbar vertebral mechanical stability of fractures after Harrington-rod instrumentation.

Authors
  • Purcell, G A
  • Markolf, K L
  • Dawson, E G
Type
Published Article
Journal
The Journal of bone and joint surgery. American volume
Publication Date
Jan 01, 1981
Volume
63
Issue
1
Pages
71–78
Identifiers
PMID: 7451528
Source
Medline
License
Unknown

Abstract

The presence of internal fixation rods in itself does not make the unstable fractured spine stronger in a flexion mode. The level of hook placement above and below the fracture is important in determining with bending strength of the instrumented spine. When the use of Harrington distraction rods is contemplated for internally stabilizing a fractured spine, a specific level of hook placement, three laminae above and two laminae below the point of instability, is recommended. This configuration allows the instrumentation to maintain increased spinal stability in a flexion mode by reducing the tendency for the upper hooks to "back out" and lose their hold secondary to vertebral tilting.

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