Chehrassan M
Bone and Joint reconstruction research center, Shafa Orthopedic Hospital, Iran University of Medical Sciences, Tehran, Iran, Tehran, Islamic Republic of Iran.
Department of Orthopedic, School of Medicine, Iran University of Medical Sciences, Tehran, Islamic Republic of Iran.
Musculoskelet Surg. 2025 Aug 5. doi: 10.1007/s12306-025-00913-w.
Traditional methods for evaluating spinal curves, such as the Cobb angle, are limited in their ability to capture the full complexity of spinal deformities. This manuscript presents a novel method that builds on Cobb's principle and Ferguson's approach to provide a more comprehensive assessment of spinal curves. The method involves identifying the centroid-based endpoints of the curve to define its "radius of curvature" and calculating the true curve length through a three-point measurement, including the apical vertebra. The curve's type and sharpness are determined using ratios of distances derived from apical and adjacent lines, enabling detailed geometric characterization.This approach allows for precise analysis of complex deformities, such as continuous kyphotic curves in ankylosing spondylitis, and facilitates improved preoperative planning by aligning surgical strategies with the geometry of the curve. Additionally, it extends to evaluating bent rods in spinal instrumentation, ensuring accurate alignment. The method's ability to integrate multiple curve characteristics addresses critical limitations of existing techniques and holds potential for enhancing outcomes in both clinical and research settings.
传统的评估脊柱曲线的方法，如 Cobb 角，在捕捉脊柱畸形的全部复杂性方面能力有限。本手稿提出了一种基于 Cobb 原理和 Ferguson 方法的新方法，以提供对脊柱曲线更全面的评估。该方法包括识别基于质心的曲线端点以定义其“曲率半径”，并通过三点测量（包括顶椎）计算真实曲线长度。使用从顶椎线和相邻线得出的距离比率来确定曲线的类型和尖锐程度，从而实现详细的几何特征描述。这种方法允许对复杂畸形进行精确分析，例如强直性脊柱炎中的连续后凸曲线，并通过使手术策略与曲线几何形状相匹配来促进改进术前规划。此外，它还扩展到评估脊柱器械中的弯曲棒，确保准确对齐。该方法整合多种曲线特征的能力解决了现有技术的关键局限性，并在临床和研究环境中都具有改善结果的潜力。
