Zagra A, Lamartina C, Pace A, Balzarini E, Zerbi A, Scoles P, Ajello F, Mazzarella P, Pillitteri G
Istituto Ortopedico Galeazzi, Milan, Italy.
Spine (Phila Pa 1976). 1988 Feb;13(2):155-61.
Thirty patients who had posterior vertebral fusion for scoliosis, performed without metallic implants, were examined using computer-assisted tomography to study the configuration of the evolving fusion mass. It was observed that the deposition of bone followed lines of force, according to Wolff's Law. The greatest amounts of bone at the apex of the curve on the concave side indicate that flexion-compression forces are greater at this point. Further, it was observed that usually the fusion mass, seen in section, has a hollow "box-section" shape, which means that a resorption of unstressed central bone occurs. The hypothesis that the torsional forces are the predominant forces acting on the scoliotic spine can explain the characteristic "box-section" of the CT scans obtained.
对30例未使用金属植入物进行脊柱后凸融合术治疗脊柱侧弯的患者，采用计算机断层扫描检查，以研究融合块的演变形态。观察到骨沉积遵循沃尔夫定律，沿力线分布。凹侧曲线顶点处骨量最多，表明此处的屈曲压缩力更大。此外，观察到通常在切片中看到的融合块呈中空的“箱形截面”形状，这意味着无应力的中央骨发生了吸收。作用于脊柱侧弯脊柱的主要力是扭力这一假说，可以解释所获得的CT扫描的特征性“箱形截面”。
