Berthonnaud Eric, Papin Patrice, Deceuninck Julie, Hilmi Radwan, Bernard Jean Claude, Dimnet Joannes
L'Hôpital Nord Ouest Villefranche/Saône, Plateau d'Ouilly, BP 436, 69655, Villefranche/Saône cedex, France.
Group of Applied Research in Orthopedic (GARO), Villefranche/Saône, France.
Int Orthop. 2016 Jun;40(6):1187-96. doi: 10.1007/s00264-015-3080-4. Epub 2016 Jan 4.
Clinical parameters, characterizing the spinal deformations due to scoliosis, are still directly measured on the spinal curve plane projections.
A 3D spinal curve has been reconstructed from its two projections, using photogrammetric techniques. Each spinal curve is a compound of several plane regions, where it is purely flexed, and short zones of connection, where abduction and axial rotation components are concentrated. All spinal curves are represented as linear chains of regional planes articulated together. The regional plane is represented by a triangle, where one summit corresponds to the point of maximum offset. The set of weight forces, representing pelvis and spine, forms a bundle of vertical forces. The dispersion of the bundle illustrates the postural stability of patients.
The first objective was to numerically describe the changes of the 3D spinal feature, due to the correcting treatment. Changes are calculated from the comparison between 3D radiologic situations, between before and after treatment. The second objective was to determine the direction of the external force, which would be the most efficient for correcting the patient set spine/rib cage. A mild mechanical analysis is proposed, for representing the transit of the external force, from rib cage to thoracic regional plane.
用于表征脊柱侧弯所致脊柱畸形的临床参数仍直接在脊柱曲线平面投影上测量。
利用摄影测量技术从其两个投影重建三维脊柱曲线。每条脊柱曲线由几个纯弯曲的平面区域和连接短区域组成，外展和轴向旋转分量集中在连接短区域。所有脊柱曲线均表示为相互铰接的区域平面的线性链。区域平面由一个三角形表示，其中一个顶点对应最大偏移点。代表骨盆和脊柱的一组重力形成一束垂直力。这束力的分散说明了患者的姿势稳定性。
第一个目标是从数值上描述矫正治疗后三维脊柱特征的变化。通过比较治疗前后的三维放射学情况来计算变化。第二个目标是确定最有效地矫正患者脊柱/胸廓的外力方向。提出了一种简单的力学分析方法，用于表示外力从胸廓到胸段区域平面的传递。
