S Morteza Kazemi; Shahin Salehi; S Mohamad Qoreishi; Mehrshad Poursaeid Esfahani; Mohammad Hassbi; Jila Sharghi; Farshad Safdari
Abstract
Introduction: Hip dysplasia can be associated with early degenerative changes. Different values have been
reported for incidence of hip dysplasia in different countries. In the current study, we are reporting on the incidence
of hip dysplasia in a group of normal Iranians evaluated by measuring ...
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Introduction: Hip dysplasia can be associated with early degenerative changes. Different values have been
reported for incidence of hip dysplasia in different countries. In the current study, we are reporting on the incidence
of hip dysplasia in a group of normal Iranians evaluated by measuring the morphologic parameters of acetabulum on
radiographs.
Materials and Method: 586 hips (293 person) were enrolled in this study. On anteroposterior hip radiographs,
the following 5 parameters were measured: Central edge angle (CEA), acetabular angle (AA), acetabular depth (AD),
acetabular roof obliquity (ARO) and roof angle (RA). The normal and abnormal values were obtained in different
sexes and compared with the known normal values in orthopaedic literature. Furthermore, the correlation between
the above measurements was investigated.
Results: Based on CEA, 15 (2.6%) of hips were dysplastic:-0.7% definite and 1.9% mild. 19 hips (3.2%) were
dysplastic when using AA values. AD and RA were significantly higher in males. Except for lack of correlation
between AA and AD, the other parameters -in particular, CEA and AA- were closely correlated. CEA, AA, ARO and
RA were significantly different between dysplastic and non-dysplastic hips.
Conclusion: Definite or mild dysplasia was recognized in 0.7% and 1.9% of the “normal” population that was
studied. Since CEA was the same between males and females and was correlated with all other morphologic
parameters, it seems that CEA is a useful measurement to evaluate presence of hip dysplasia.
