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Acetabular Defect Reconstruction with Trabecular Metal Augments: Study with Minimum One-year Follow-up
Chirayu Dwivedi1, Sandeep Gokhale1, Hyun Gon Khim1
1Department of Orthopaedic Surgery, Korea University Guro Hospital, Seoul, Korea.
Hip & Pelvis
|September 29, 2017
Summary
Trabecular metal augments show promising short-term results for acetabular defects, improving hip function and stability. Further long-term studies are needed to fully evaluate their effectiveness in revision total hip arthroplasty.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
Background:
- Type III acetabular defects present significant challenges in total hip arthroplasty (THA) due to high rates of mechanical failure.
- Porous trabecular metal augments offer potential advantages, including excellent biomechanical properties, biocompatibility, early stability, and enhanced bone ingrowth.
Purpose of the Study:
- To evaluate the short-term clinical and radiological outcomes of using trabecular metal augments for acetabular defect reconstruction.
Main Methods:
- A study involving 28 patients (22 revision THA, 6 primary THA) utilizing trabecular metal augments for acetabular reconstruction.
- Patients were classified using the Paprosky criteria (18 grade 3A, 10 grade 3B).
- Clinical outcomes were assessed using the Harris Hip Score (HHS), and radiological outcomes included osteolysis and osseointegration (Moore's criteria).
Main Results:
- Significant improvement in HHS from 58.00 to 86.20.
- Successful restoration of hip center of rotation, moving from 38.90 mm preoperatively to 23.85 mm postoperatively.
- Osseointegration was observed in all patients, with 18 showing three or more signs and 10 showing one to two signs; no radiolucency, osteolysis, or loosening was detected.
Conclusions:
- Trabecular metal augments demonstrate highly satisfactory short-term outcomes in acetabular defect reconstruction.
- Long-term follow-up is necessary for a comprehensive evaluation of these implants.
