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Normal values of Wiberg's lateral center-edge angle and Lequesne's acetabular index-a coxometric update

Werner, Clément ; Ramseier, Leonhard ; Ruckstuhl, Thomas ; Stromberg, Jeff ; Copeland, Carol ; Turen, Clifford ; Rufibach, Kaspar ; Bouaicha, Samy

In: Skeletal Radiology, 2012, vol. 41, no. 10, p. 1273-1278

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    Titre
    • Normal values of Wiberg's lateral center-edge angle and Lequesne's acetabular index-a coxometric update
    Auteur
    • Werner, Clément. Division of Trauma Surgery, University Hospital Zurich, Raemistrasse 100, 8091, Zürich, Switzerland
    • Ramseier, Leonhard. Department of Orthopaedics, Balgrist University Hospital Zurich, Forchstrasse 340, 8008, Zürich, Switzerland
    • Ruckstuhl, Thomas. Department of Orthopaedics, Balgrist University Hospital Zurich, Forchstrasse 340, 8008, Zürich, Switzerland
    • Stromberg, Jeff. R Adams Cowley Shock Trauma Center, University of Maryland Medical Systems, 22 South Greene Street, 21201, Baltimore, MD, USA
    • Copeland, Carol. R Adams Cowley Shock Trauma Center, University of Maryland Medical Systems, 22 South Greene Street, 21201, Baltimore, MD, USA
    • Turen, Clifford. R Adams Cowley Shock Trauma Center, University of Maryland Medical Systems, 22 South Greene Street, 21201, Baltimore, MD, USA
    • Rufibach, Kaspar. Biostatistics Unit, Institute for Social and Preventive Medicine, University of Zurich, Hirschengraben 84, 8001, Zürich, Switzerland
    • Bouaicha, Samy. Division of Trauma Surgery, University Hospital Zurich, Raemistrasse 100, 8091, Zürich, Switzerland
    Type de document
    • Postprint
    Identifiant OAI-PMH
    • oai:doc.rero.ch:314741
    Summary
    Background: The historical pathological cut-off values for Wiberg's lateral center-edge (LCE) angle and Lequesne's acetabular index (AI) are below 20° and above 12° for the LCE and AI, respectively. The aim of this study was to reassess these two angles more than 50years after their introduction using a standardized conventional radiological measurement method, considering changing social habits and their associated physiological changes. Methods: A total of 1,226 anteroposterior radiographs of the pelvis (2,452 hips) were obtained according to a strict standardized radiographic technique allowing reliable measurements of the LCE angle and the AI. Results: Distributions of the LCE and AI were pronouncedly Gaussian, with mean values of 33.6° for the LCE and 4.4° for the AI. The 2.5th and 97.5th empirical percentiles were 18.1 and 48.0° for the LCE and −6.9 and 14.9° for the AI. These intervals contained 95% of the data in our large sample. Small but statistically significant differences between the sexes and right and left hips have been demonstrated. Correlation between age and coxometric indices was low. Conclusion: The above findings do not conflict with the historical benchmarks. Statistical differences between sexes and between right and left hips were not clinically relevant. No conclusion can be drawn about coxometric indices and clinical manifestations of hip dysplasia