[Reconstruction of large acetabular defects using trabecular metal augments]

Area of Science:

• Orthopedic Surgery
• Biomaterials Engineering
• Reconstructive Surgery

Context:

• Acetabular defects present significant challenges in total hip arthroplasty revision.
• Paprosky types IIb-IIIb and segmental defects require advanced reconstructive techniques.
• Restoring hip biomechanics and stability is crucial for long-term implant survival.

Purpose:

• To evaluate the efficacy of the Trabecular Metal Technology (TMT) system for acetabular reconstruction.
• To assess functional outcomes and implant stability in patients with complex acetabular defects.
• To determine the potential of TMT in revision hip arthroplasty for preventing further bone loss.

Summary:

• The study reconstructed acetabular defects (Paprosky IIb-IIIb) in 38 patients using the TMT system.
• Postoperative functional scores (Merle d'Aubigné and Harris Hip) showed significant improvement after an average of 25 months.
• High primary and secondary stability were achieved, with only two revisions required due to loosening or migration.

Impact:

• The TMT system provides a robust solution for complex acetabular defects, enhancing functional recovery.
• Successful reconstruction with TMT can reduce the need for further revision surgeries.
• This technology aids in restoring the original center of rotation and preventing progressive bone loss in hip revision arthroplasty.