European Spine Journal

, Volume 21, Issue 4, pp 691–697 | Cite as

The effect of simulating leg length inequality on spinal posture and pelvic position: a dynamic rasterstereographic analysis

  • Marcel Betsch
  • Michael WildEmail author
  • Birgit Große
  • Walter Rapp
  • Thomas Horstmann
Original Article



Leg length inequalities (LLI) are a common finding. Rasterstereography offers a non-invasive, contact-free and reliable method to detect the effects of LLIs on spinal posture and pelvic position.

Materials and methods

A total of 115 subjects were rasterstereographically examined during different artificially created leg length inequalities (5–15 mm) using a platform. The pelvic obliquity and torsion and the lateral and frontal deviation of the spine, as well as the surface rotation, were measured.


Changes in platform height led to an increase of the pelvic tilt and torsion. Only minor changes in the spinal posture were found by different simulated leg length inequalities.


Our study showed that there was a correlation between an artificial leg length inequality up to 15 mm and pelvic tilt or torsion, but only minor changes in the spinal posture were measured. Further studies should investigate the effects of greater leg length inequalities on spine and pelvis.


Leg length inequality Posture Rasterstereography Pelvic tilt Pelvic torsion 



No funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.

Conflict of interest



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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Marcel Betsch
    • 1
  • Michael Wild
    • 1
    Email author
  • Birgit Große
    • 2
  • Walter Rapp
    • 2
  • Thomas Horstmann
    • 3
  1. 1.Department of Trauma and Hand SurgeryHeinrich Heine University HospitalDüsseldorfGermany
  2. 2.Department of Sports MedicineEberhard Karls University HospitalTuebingenGermany
  3. 3.Department of OrthopedicsMedical Park St. HubertusBad WiesseeGermany

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