title: Lateral acetabular labral length is inversely related to acetabular coverage as measured by lateral center edge angle of Wiberg.
abstract: Patients with developmental dysplasia of the hip often have compensatory labral hypertrophy, which presumably lends stability to an unstable joint. Conversely, patients with acetabular overcoverage may have small or ossified labra. The purpose of this study is to explore the interaction of labral length with the degree of acetabular hip coverage. A retrospective cohort of patients with hip pain presenting to a hip preservation center, who had undergone hip magnetic resonance imaging and AP pelvis radiographs were studied. General linear multivariate models were used to assess the association between three measures of labral length (lateral, anterior and anterior inferior locations along the acetabular rim) and the X-ray derived lateral center edge angle (LCEA) of Wiberg. Of the three acetabular labral locations measured, only the lateral labrum was associated with LCEA Wiberg (P = 0.0008). Lateral labral length increases as LCEA of Wiberg decreases. The anterior and anterior inferior labral locations did not show a predictable increase in labral length as LCEA Wiberg decreased.
authors: 1. Division of Musculoskeletal Radiology, Department of Radiology and Orthopaedics, University of Colorado School of Medicine, University of Colorado Denver, Aurora, CO, USA; 2. Inland Imaging, PS. Division of the Musculoskeletal Radiology, Spokane, WA, USA.
authors: Brian D
authors: BD
authors: Petersen
authors: 3. Department of Radiology, University of Colorado School of Medicine, University of Colorado Denver, Aurora, CO, USA.
authors: Bryan
authors: B
authors: Wolf
authors: 4. Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, CO, USA.
authors: Jeffrey R
authors: JR
authors: Lambert
authors: 4. Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, CO, USA.
authors: Carolyn W
authors: CW
authors: Clayton
authors: 3. Department of Radiology, University of Colorado School of Medicine, University of Colorado Denver, Aurora, CO, USA; 4. Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, CO, USA.
authors: Deborah H
authors: DH
authors: Glueck
authors: 1. Division of Musculoskeletal Radiology, Department of Radiology and Orthopaedics, University of Colorado School of Medicine, University of Colorado Denver, Aurora, CO, USA.
authors: Mary Kristen
authors: MK
authors: Jesse
authors: 5. Division of Sports Medicine and Hip Preservation, Department of Orthopaedics, University of Colorado School of Medicine, University of Colorado Denver, Aurora, CO, USA.
authors: Omer
authors: O
authors: Mei-Dan