Racial and geographic differences of Wiberg's angle from 400 ultrasonographic normal hips in Italian and Brazilian infants younger than 3 months old

The Wiberg center edge angle (CEA) of 400 hip sonographies among 200 infant s, 100 Italians and 100 Brazilians, aged from 15 days to 90 days, whose hip joints were considered normal, from the ultrasonographic point of view (1a and 1b) according to Graf's classification were measured. For the CEA meas urements in the studied material, the authors used their own methodology de veloped for this purpose, which is based on basic geometric concepts and ap plied by one graphic computer program. In the studied material, the statist ical analysis of the results obtained in the measurement of the CEA showed a better conformation of the acetabular roof complex in the Brazilian infan ts compared with the Italian.