• Marcel Betsch, Michael Wild, Birgit Große, Walter Rapp, and Thomas Horstmann.
• Department of Trauma and Hand Surgery, Heinrich Heine University Hospital, Moorenstrasse 5, 40225, Düsseldorf, Germany.
• Eur Spine J. 2012 Apr 1;21(4):691-7.

IntroductionLeg 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 MethodsA 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.ResultsChanges 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.ConclusionsOur 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.

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