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Skeletal Radiology

, Volume 41, Issue 10, pp 1273–1278 | Cite as

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

  • Clément M. L. WernerEmail author
  • Leonhard E. Ramseier
  • Thomas Ruckstuhl
  • Jeff Stromberg
  • Carol E. Copeland
  • Clifford H. Turen
  • Kaspar Rufibach
  • Samy Bouaicha
Scientific Article

Abstract

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 50 years 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.

Keywords

Hip Acetabulum Lateral center-edge angle Acetabular index Pelvic radiographs 

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Copyright information

© ISS 2012

Authors and Affiliations

  • Clément M. L. Werner
    • 1
    • 2
    Email author
  • Leonhard E. Ramseier
    • 3
  • Thomas Ruckstuhl
    • 3
  • Jeff Stromberg
    • 2
  • Carol E. Copeland
    • 2
  • Clifford H. Turen
    • 2
  • Kaspar Rufibach
    • 4
  • Samy Bouaicha
    • 1
  1. 1.Division of Trauma SurgeryUniversity Hospital ZurichZürichSwitzerland
  2. 2.R Adams Cowley Shock Trauma CenterUniversity of Maryland Medical SystemsBaltimoreUSA
  3. 3.Department of OrthopaedicsBalgrist University Hospital ZurichZürichSwitzerland
  4. 4.Biostatistics Unit, Institute for Social and Preventive MedicineUniversity of ZurichZürichSwitzerland

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