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Physeal changes corresponding to cam morphology are currently measured using 2D methods. These methods are limited by definitions of thefemoral neckaxis and head center that are dependent on the radiographic plane of view. To address theselimitations, we developed 3D methods for analyzing continuous growth plate shape using MRI scans. These newmethodsrely ona single definition of the femoral neck axis and head centerthat are non-dependent on the radiographic plane of view andallow for analysis of growth plate shape across the growth platesurface(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 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. This article is protected by copyright. All rights reserved.

Original publication

DOI

10.1002/jor.24972

Type

Journal article

Journal

J orthop res

Publication Date

24/12/2020

Keywords

cam morphology, epiphyseal extension, physeal morphology, three-dimensional measures