Congenital hip dislocation in the high risk group - X ray- diagnosis and epidemiology

A cross-sectional study of 204 hip radiographs of high risk CDH (Congenital Dislocation of the Hip) group newborn, using: (1) The Tonnis critenrion of acetabular index upper limit 35 degrees. (2) The position of femoral metaphyseal "beak" with Perkins and Hilgenreiner's lines, showed: 21 CDH/204 risk newborn or 10.24% with 7.35% Dislocatable Hip, 2.93% Complete Dislocation; Female = 9.5:1; Left side: Right side=3:2.