Acetabular revision arthroplasty using so-called jumbo cementless components: an average 7-year follow-up study

Area of Science:

• Orthopedic Surgery
• Biomaterials Engineering
• Reconstructive Surgery

Background:

• Acetabular revision surgery for major bone stock deficiency presents significant challenges.
• The use of large, hemispherical cementless acetabular components (jumbo components) is one approach for complex hip reconstructions.
• Optimal surgical techniques for these challenging cases remain debated.

Purpose of the Study:

• To evaluate the intermediate-term outcomes of acetabular revision using large (≥66 mm diameter) cementless hemispherical acetabular components.
• To assess the efficacy and complication rates associated with this reconstructive technique in hips with substantial bone loss.

Main Methods:

• Retrospective review of 24 hips in 24 patients undergoing uncemented acetabular revision with a hemispherical component (≥66 mm diameter).
• Concurrent femoral component replacement was performed in 16 hips.
• Clinical and radiographic assessment at a mean follow-up of 7.0 years for surviving patients.

Main Results:

• No acetabular component required revision, and none showed radiographic loosening.
• The mean final Harris Hip Score was 86 points.
• A high overall complication rate was observed, with excellent results in cases without infection.

Conclusions:

• Large diameter cementless hemispherical acetabular components can provide durable fixation in complex acetabular revisions with major bone stock deficiency.
• Despite excellent implant survival and functional scores in non-infected cases, the overall complication rate necessitates careful patient selection and surgical planning.
• This technique offers a viable reconstructive option for challenging acetabular defects, but risks, particularly infection, must be managed.