Simulation of Progressive Deformities in Adolescent Idiopathic Scoliosis Using a Biomechanical Model Integrating Vertebral Growth Modulation

[+] Author and Article Information
I. Villemure

Research Center, Sainte-Justine Hospital 3175, Cote Sainte-Catherine Road Montreal (Quebec) H3T 1C5 CanadaUniversity of Montreal Biomedical Engineering Institute P.O. Box 6128, Station “Centre-ville” Montreal (Quebec) H3C 3J7 Canada

C. É. Aubina, J. Dansereau

Research Center, Sainte-Justine Hospital 3175, Cote Sainte-Catherine Road Montreal (Quebec) H3T 1C5 CanadaEcole Polytechnique de Montreal Mechanical Engineering Department P.O. Box 6079, Station “Centre-ville” Montreal (Quebec) H3C 3A7 Canada

H. Labelle

Research Center, Sainte-Justine Hospital 3175, Cote Sainte-Catherine Road Montreal (Quebec) H3T 1C5 CanadaUniversity of Montreal Biomedical Engineering Institute P.O. Box 6128, Station “Centre-ville” Montreal (Quebec) H3C 3J7 Canada

J Biomech Eng 124(6), 784-790 (Dec 27, 2002) (7 pages) doi:10.1115/1.1516198 History: Received August 01, 2000; Revised June 01, 2002; Online December 27, 2002
Copyright © 2002 by ASME
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Grahic Jump Location
Finite element model: (a) thoracic and lumbar spine (global axis system: X (anterior), Y (left lateral) and Z (cephalic)); (b) vertebral motion segment (bone local axis system: x (perpendicular to growth-plates) and y, z (parallel to growth-plates))
Grahic Jump Location
Biomechanical stepwise incremental procedure separately simulating growth, external loading of the spine and corresponding growth modulation (σ=0: reset of the model stress and strain states)
Grahic Jump Location
Initial configuration and configurations at the 6th, 12th, 18th, and 24th in frontal, lateral and transverse spinal views: (a) Simulation 1 (βx=0.8 MPa−1 , βyz=0);(b) Simulation 2 (βx=0.8 MPa−1 , βyz=0.2 MPa−1 )
Grahic Jump Location
Monthly evolution of regional scoliotic descriptors Cobb and kyphosis
Grahic Jump Location
Monthly evolution of local scoliotic descriptors wedging angle ω and axial rotation θz



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