%0 Journal Article %T Geometric Structure of 3D Spinal Curves: Plane Regions and Connecting Zones %A E. Berthonnaud %A R. Hilmi %A J. Dimnet %J ISRN Orthopedics %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/840426 %U http://dx.doi.org/10.5402/2012/840426