Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts, USA.
Department of Bioengineering, Northeastern University, Boston, Massachusetts, USA.
J Orthop Res. 2021 Nov;39(11):2398-2408. doi: 10.1002/jor.24972. Epub 2021 Jan 10.
Physeal changes corresponding to cam morphology are currently measured using two-dimensional (2D) methods. These methods are limited by definitions of the femoral neck axis and head center that are dependent on the radiographic plane of view. To address these limitations, we developed three-dimensional (3D) methods for analyzing continuous growth plate shape using magnetic resonance imaging scans. These new methods rely on a single definition of the femoral neck axis and head center that are both nondependent on the radiographic plane of view and allow for analysis of growth plate shape across the growth plate surface (performed using statistical parametric mapping). Using our 3D method, we analyzed the position of the growth plate in the femoral head (relative to a plane tangent to the femoral head) and the curvature of the growth plate (relative to a plane through the center of the growth plate) in 9-16-year-old males at risk for cam morphology and their recreationally active peers (n = 17/cohort). These two measurements provide an avenue to separately analyze the effects of these variables in the overall growth plate shape. We detected differences in growth plate shape with age in recreationally active adolescents but did not detect differences between at risk and recreationally adolescents.
目前，与凸轮形态相对应的骺板变化是通过二维（2D）方法来测量的。这些方法受到股骨颈轴和股骨头中心定义的限制，而这些定义依赖于射线照相的平面视图。为了解决这些限制，我们开发了使用磁共振成像扫描分析连续骺板形状的三维（3D）方法。这些新方法依赖于股骨颈轴和股骨头中心的单一定义，它们都不依赖于射线照相的平面视图，并允许在骺板表面上分析骺板形状（使用统计参数映射进行分析）。使用我们的 3D 方法，我们分析了 9-16 岁男性中存在凸轮形态风险者及其休闲活跃同龄人（n=17/队列）的骺板在股骨头中的位置（相对于与股骨头相切的平面）和骺板的曲率（相对于穿过骺板中心的平面）。这两个测量值提供了一种途径，可以分别分析这些变量对整个骺板形状的影响。我们在休闲活跃的青少年中检测到了随年龄增长而发生的骺板形状变化，但在存在风险的青少年和休闲活跃的青少年之间没有检测到差异。
