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Journal of Children's Orthopaedics

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Open Access 01-10-2016 | Original Clinical Article

Defining the lateral edge of the femoroacetabular articulation: correlation analysis between radiographs and computed tomography

Authors: Ashish Mittal, James D. Bomar, Megan E. Jeffords, Ming-Tung Huang, Dennis R. Wenger, Vidyadhar V. Upasani

Published in: Journal of Children's Orthopaedics | Issue 5/2016

Abstract

Purpose

The purpose of this study was to analyze the variation in measuring the lateral center edge angle of Wiberg (LCEA) using the lateral edge of the sourcil (LCEA-S) compared to the lateral edge of the acetabulum (LCEA-E), and to correlate these measurements with three-dimensional computed tomography (3D-CT)-based analysis of the femoroacetabular articulation.

Methods

A retrospective analysis was performed on 24 patients (45 hips) treated for hip dysplasia at a single institution. All patients were required to have an anteroposterior (AP) pelvis radiograph and pelvic CT. LCEA-S and LCEA-E measurements were calculated from radiographs. Axial CT images were processed to standardize pelvic orientation and calculate the LCEA at three points (posterior, central, anterior) along the acetabular edge. Correlation analysis was used to evaluate radiographic and CT measures.

Results

Eight males and 16 females with an average age of 14.6 years were included. The LCEA-S (16.5° ± 2.0°) was found to be significantly less than the LCEA-E (26.0° ± 2.0°) (p < 0.001). The LCEA-S had the greatest correlation with the central measurement on the 3D-CT (r _s = 0.893; p < 0.001). The LCEA-E had the greatest correlation with the anterior measurement on the 3D-CT (r = 0.834; p < 0.001).

Conclusions

The LCEA can change significantly depending on the bony landmark used to define the lateral edge of the femoroacetabular articulation. The edge of the sourcil most closely correlates with the central weight-bearing portion of the articular surface on the 3D-CT and should be used to define the LCEA when treating patients with hip dysplasia.

Level of evidence

Level III, retrospective comparison study.

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Title: Defining the lateral edge of the femoroacetabular articulation: correlation analysis between radiographs and computed tomography
Authors: Ashish Mittal
James D. Bomar
Megan E. Jeffords
Ming-Tung Huang
Dennis R. Wenger
Vidyadhar V. Upasani
Publication date: 01-10-2016
Publisher: Springer Berlin Heidelberg
Published in: Journal of Children's Orthopaedics / Issue 5/2016
Print ISSN: 1863-2521
Electronic ISSN: 1863-2548
DOI: https://doi.org/10.1007/s11832-016-0768-y

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Defining the lateral edge of the femoroacetabular articulation: correlation analysis between radiographs and computed tomography

Abstract

Purpose

Methods

Results

Conclusions

Level of evidence

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

Level of evidence

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