Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel.
The Orthopedic Surgery Department, Hadassah Medical Center, Jerusalem, Israel.
J Hand Surg Eur Vol. 2021 Jul;46(6):607-615. doi: 10.1177/17531934211004434. Epub 2021 Apr 1.
Classifications of scaphoid fractures associate the angle of the fracture with its stability. To examine this assumption, we measured acute scaphoid fracture angles and inclinations in relation to different scaphoid axes, using fracture displacement as an indicator of instability. We examined the effect of using different axes on the measurements of angles. CT scans of 133 scaphoid fractures were classified according to the location of the fractures. Using a three-dimensional computer model, we computed four scaphoid axes. For each fracture, we then measured the fracture angle and the direction of the fracture inclination in relation to each one of the axes. We found a correlation between displacement and the angles of proximal fractures using one of these axes (the surface principal component analysis axis). No such correlations were found for waist fractures, which were the majority of fractures. There were significant differences between the measurements made with different axes. The findings indicate that the angle of the fracture and the direction of the fracture inclination are minor factors in the displacement of most scaphoid fractures. III.
手舟骨骨折的分类将骨折的角度与其稳定性联系起来。为了检验这一假设，我们使用骨折移位作为不稳定的指标，测量了急性手舟骨骨折的角度和倾斜度与不同手舟骨轴之间的关系。我们研究了使用不同轴对测量角度的影响。根据骨折的位置，对 133 例手舟骨骨折进行 CT 扫描分类。使用三维计算机模型，我们计算了四个手舟骨轴。然后，我们针对每个骨折，在手舟骨轴中的每一个轴上测量骨折角度和骨折倾斜的方向。我们在手舟骨骨折的一个轴（表面主成分分析轴）上发现了与移位之间的相关性。而对于大多数的腰部骨折，没有发现这样的相关性。不同轴之间的测量值存在显著差异。这些发现表明，在手舟骨骨折中，骨折角度和骨折倾斜方向是导致大多数骨折移位的次要因素。III.
