The Study: What are the biomechanical consequences of a structural leg length discrepancy on the adolescent spine during walking?
a. Structural leg length inequalities are common.
b. The authors looked at 10 adolescent subjects with leg length discrepancy (LLD) of from 10 to 60mm.
c. They were compared to 14 healthy subjects.
d. All were examined after walking barefoot and the LLD subjects also walked with orthotic shoe lifts.
e. Data was recorded using a 12 camera system.
f. The authors concluded: “In conclusion, LLD patients in the current study showed a pelvic drop on the shorter side, which they appeared to compensate for with a
lateral bending in the lumbar spine and a lateral shift of the pelvis towards
the longer side.”
g. The deviations were immediately influenced when the orthotic lift was used.
Leg length inequalities affect the patient’s gait and this gait deviation is changed by using an orthotic lift.
Dr. Keith Rau has sent me a number of articles and this is one of them. I want to thank him and the other people who have also sent me articles over the years. I find it gratifying that people read this column and I hope that you will take a moment to share Science in Brief with your friends. As to this article, take note of the finding that there was a change immediately when the lift was used. This is another example of the affect that structural changes can make.
Reviewer: Roger Coleman DC
Editor: Mark R. Payne DC
Reference: Bangerter C, Romkes J, Lorenzetti S. What are the biomechanical consequences of a structural leg length discrepancy on the adolescent spine during walking? Gait Posture 2019 Feb;68:506-513. doi: 10.1016/j.gaitpost.2018.12.040. Epub 2018 Dec 28.
Link to Abstract: https://www.ncbi.nlm.nih.gov/pubmed/30623844