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Relationship between limb length discrepancy and load distribution across the sacroiliac joint—a finite element study
Author(s) -
Kiapour Ali,
Abdelgawad Amr A.,
Goel Vijay K.,
Souccar Adham,
Terai Tomoya,
Ebraheim Nabil A.
Publication year - 2012
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.22119
Subject(s) - sacroiliac joint , pelvis , finite element method , femur , medicine , orthodontics , joint (building) , offset (computer science) , epiphysiodesis , load distribution , mathematics , anatomy , surgery , structural engineering , orthopedic surgery , computer science , engineering , programming language
We assessed the relationship between leg length discrepancy (LLD) and the load distribution across the sacro‐iliac joint (SIJ). A finite element model of the spine–pelvis was developed with different amounts of LLD by increasing the length of the right femur in the model. Peak stresses and contact loads across the SIJ were computed for different amounts of LLD (1, 2, and 3 cm). The load and the peak stresses across the SIJ articular surfaces progressively increased with the increase in the LLD. Trying to offset the LLD surgically by lengthening of the short side, shortening or stunting the growth (epiphysiodesis) of the long side, or by shoe lifts should decrease the load across the SIJ and should theoretically decrease SIJ pain. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 30:1577–1580, 2012