Long-term follow-up of congenital subluxation of the hip

This is a retrospective study of long-term radiographic results for congeni tal subluxation of the hip (CSH) after closed reduction at the authors' hos pital from 1963 to 1980. The age at Final follow-up ranged from 14.0 to 33. 9 years (average 19.1). The diagnosis of CSH was determined radiographicall y using Ishida criteria. The center-edge angle (CE angle) and the Sharp ang le were measured serially, and the final results were evaluated using Sever in classification, and evaluation of avascular necrosis used the classifica tion of Kalamchi and MacEwen. Sixty-nine (26.3%) of 262 hips with CSH were rated as Severin group III or IV. Avascular necrosis was found in 12 hips ( 4.6%). The CE angle of unaffected hips had strong correlation with that elf affected hips.. These late results were not satisfactory and indicate that patients with CSH should be followed up at least until skeletal maturity, as is done with complete hip dislocation.