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

作者：Werner Clement M L^*; Ramseier Leonhard E; Ruckstuhl Thomas; Stromberg Jeff; Copeland Carol E; Turen Clifford H; Rufibach Kaspar; Bouaicha Samy

来源：Skeletal Radiology, 2012, 41(10): 1273-1278.

DOI：10.1007/s00256-012-1420-7

• Hip
• Acetabulum
• Lateral center-edge angle
• Acetabular index
• Pelvic radiographs

The historical pathological cut-off values for Wiberg's lateral center-edge (LCE) angle and Lequesne's acetabular index (AI) are below 20A degrees and above 12A degrees 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.
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.
Distributions of the LCE and AI were pronouncedly Gaussian, with mean values of 33.6A degrees for the LCE and 4.4A degrees for the AI. The 2.5th and 97.5th empirical percentiles were 18.1 and 48.0A degrees for the LCE and -6.9 and 14.9A degrees 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.
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.

• 出版日期2012-10