Surgical treatment of the late - presenting developmental dislocation of the hip after walking age.

Objective: Cases of developmental dislocation of the hip (DDH) still occur after walking age because of late or missed diagnosis and failed conservative treatment. The choice of treatment for DDH after walking age continues to be controversial, and one of the options is open reduction combined with innominate osteotomy.

Methods: Twenty patients with 26 surgically treated hips with DDH, were evaluated from 2005 to 2008, using innominate osteotomy by Salter's technique after open reduction and capsulorraphy. The age of patients, fifteen females and five males, at time of surgery ranged from 12 to 18 months (mean age 14.7 months). Six patients had bilateral dislocation and in the remaining, nine had their left hip dislocated and five had their right hip dislocated.

Results: The results were evaluated according to modified McKay criteria and to Severin radiological criteria, after a mean follow-up of 46.7 months. Eighty - nine percent of hips were rated as excellent or good by McKay criteria. There were no poor results. According to Severin criteria, 77% were type I and II while 23% showed type III and IV, no hips were rated as Severin's group V or VI. There was one case (3.8%) of re-dislocation, but revision surgery resulted in stable, concentric, and permanent reduction. No cases of infection, graft fracture and vascular or nervous injury were reported.

Conclusion: Open reduction combined with Salter osteotomy does not hurt the hip with regard to acetabular remodeling for children between 12 and 18 months of age. Level of Evidence IV, Case Series.