Long-term outcome of total hip arthroplasty in patients with osteoarthritis secondary to the developmental dysplasia: 10-year experience

Background: Young, socially active patients suffer from severe pain and disability caused by osteoarthritis secondary to the developmental dysplasia of the hip (DDH) which leads to the need for total hip arthroplasty (THA). In this study we evaluated the long-term outcome and survivorship of endoprostheses in hip osteoarthritis patients secondary to DDH. Patients and methods: 84 patients (70 females, 14 males) with Crowe grade I ̶ IV DDH underwent 103 THA from November 2008 to December 2011 using cementless fixation endoprostheses. During the follow-up period 4 patients (4 hips) were lost, leaving at the time of the latest follow-up 80 patients (99 hips). Seventy patients with 89 unrevised hips were divided into two groups: one group with the acetabular component of endoprosthesis placed in the primary acetabular socket (group A), the second group – in the secondary acetabular socket (group B). The mean age in the time of the surgery was 44.4 years. Results: The mean follow-up was 11.5 years (range 10.5–13.1). The mean Merle d'Aubigné and Postel score in the group A increased from mean 9.63 ± 2.17 preoperatively to 15.48 ± 2.26, in group B – from 8.71 ± 2.21 preoperatively to 15.36 ± 1.78 in the final follow-up. Kaplan-Meyer implant survival was 91.9% in the last follow-up for all cases. Conclusions: Functional outcome improvement was observed in long-term follow-up in both groups, showing good functional results. All cases showed good survival rate.