[Systematic hip roentgenograms in infants of 4 months of age in the screening for congenital dislocation of the hip (author's transl)].

The authors report the results of a statistical study undertaken for the screening of congenital dislocation of the hip. 961 children born between September 24, 1977 and June 30, 1978 were examined. Congenital dislocation of the hip was diagnosed in 9 (0.9 % of the cases). Out of these, 4 had no clinical sign of dislocatability at birth. The only determination of acetabular angles cannot be relied upon and qualitative criteria such as ilium thickness must be added.