[Early x-ray diagnosis of hip dysplasia in children]

The author proposes a method of differential diagnosis of hip dislocations and hip joint dysplasia in infants aged 3 months. The alpha-angle of hip dislocation with relation to trochanteric space is determined on an anteroposterior radiogram of the hip joints; 64 degrees means hip dysplasia, 65-69 degrees and more mean dislocation. This method was tested in 75 children (150 joints) aged 3 months. A mean diagnostic accuracy was 90.1%.