Loads on an internal spinal fixation device during physical therapy

  • Rohlmann A
  • Graichen F
  • Bergmann G
  • 136


    Mendeley users who have this article in their library.
  • 31


    Citations of this article.


Sitting is often assumed to involve high loads on the spine as well as on implants for stabilising the spine. Loads on internal spinal fixation devices were therefore measured in ten patients sitting on several types of seats, including a stool, a stool with a padded wedge, a chair, a physiotherapy ball, a knee-stool, and a bench. The patients also successively sat relaxed and erect on a stool. In addition, six of them sat on a special chair allowing different inclinations of the backrest. Implant loads were also measured for standing up and sitting down. There were only minor differences in fixator loads for sitting on the different types of seats. Sitting erect caused an average of 11% higher implant loads than sitting relaxed. Implant loads decreased with increasing inclination of the upper body while sitting on a chair with an adjustable backrest. Implant loads were about 27% higher for standing up and sitting down than for sitting. Copyright © 2001 Elsevier Science Ltd.

Author-supplied keywords

  • Biomechanics
  • Internal spinal fixation device
  • Load measurement
  • Physical therapy
  • Spine

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Antonius Rohlmann

  • Friedmar Graichen

  • Georg Bergmann

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free