Acetabular Revision Using Trabecular Metal Augments for Paprosky Type 3 Defects

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Reconstructive Surgery

Background:

• Acetabular revision surgery addresses bone loss during hip arthroplasty.
• Trabecular Metal (TM) augments offer a reconstructive solution for acetabular bone defects.

Purpose of the Study:

• To evaluate the clinical and radiographic outcomes of using Trabecular Metal (TM) augments in acetabular revision surgery for Paprosky type 3 defects.

Main Methods:

• Retrospective study of 38 patients with Paprosky type 3 defects undergoing acetabular revision with TM shells and augments.
• Follow-up averaged 36 months, assessing patient-reported outcomes and radiographic evidence of loosening.

Main Results:

• Significant improvements were observed in the Short Form 12 (SF-12) health survey and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores.
• Radiographic loosening occurred in 7 constructs; one deep infection and two aseptic loosening revisions were reported.

Conclusions:

• Trabecular Metal (TM) augments demonstrate favorable short-to-medium term outcomes for complex acetabular reconstructions.
• TM augments are a viable option for managing significant bone loss in acetabular revision surgery.