The Survival of Well-Fixed Cementless Femoral Component After Isolated Acetabular Component Revision

It remains controversial whether isolated acetabular component revision or both component revision surgeries should be performed in patients with stable femoral component. The present study aimed to evaluate the survival of patients with unrevised stable uncemented femoral stem who underwent isolated acetabular component revision.

A retrospective analysis was conducted in patients who underwent isolated acetabular component revision and had stable uncemented femoral component during revision hip arthroplasty between February 1998 and December 2009. Demographic data of the patients included age, previous surgery, complications, duration between primary and revision surgery, and duration between revision and latest follow-up. Functional results were analyzed using Harris Hip Score (HHS).

Fifteen hips of thirteen patients were included in the study with a mean age of 62.08 ± 12.9 years. Average time from THA to the isolated acetabular revision was 9.2 ± 3.48 years. Average follow-up time from revision to the latest follow-up was 12.39 ± 2.68 years, and femoral components had been followed for an average of 21.6 ± 4.06 years since the time of implantation. Average HHS of the patients were 53 before revision surgery and 81.9 at the last follow-up (p < 0.001). The 10-year survival rate of patients who underwent revision in the femoral component was 100%, whereas their 15-year survival rate was 93.3%. None of the acetabular components required revision.

Isolated revision of acetabular component may be considered if there is stable uncemented femoral component in revision THA. Acetabular reconstruction quality, acetabular and unrevised femoral component survival are not affected by retaining well-fixed femoral component.

4, retrospective cohort study.