Osteolysis in the well-fixed socket: cup retention or revision?

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Arthroplasty research

Background:

• Osteolysis, or bone loss, is a frequent cause for revision surgery after total hip arthroplasty (THA).
• The management of osteolysis around a well-fixed acetabular cup presents a clinical dilemma.
• Current literature offers varying perspectives on whether to retain or revise well-fixed components in the presence of osteolysis.

Purpose of the Study:

• To evaluate the efficacy and outcomes of retaining a well-fixed acetabular cup with treatment of associated osteolysis.
• To compare the benefits and drawbacks of acetabular cup retention versus complete revision in cases of osteolysis.
• To establish criteria for selecting well-fixed cups suitable for retention strategies.

Main Methods:

• Review of existing data and studies on osteolysis management after THA.
• Analysis of treatment strategies involving debridement and grafting through existing screw holes and access channels for retained cups.
• Intra-operative assessment of cup fixation, positioning, stability, and liner/head compatibility for retained components.

Main Results:

• Several studies indicate good survivorship rates for acetabular cups retained with lesional treatment.
• Acetabular cup retention allows for debridement and grafting, potentially avoiding a complete revision.
• Complete revision offers advantages such as more thorough debridement, optimal graft fill, and improved component positioning.

Conclusions:

• Retention of a well-fixed acetabular cup is a preferred strategy when specific intra-operative criteria are met, including stability, proper positioning, and compatibility with new liners.
• Acetabular cup retention with targeted treatment can achieve favorable outcomes and survivorship.
• The decision between retaining or revising a well-fixed acetabular cup should be individualized based on patient factors and implant condition.