Acetabular reinforcement rings associated with allograft for severe acetabular defects

Area of Science:

• Orthopedic surgery
• Biomaterials engineering
• Hip reconstruction

Background:

• Severe acetabular bone defects present significant challenges in revision hip arthroplasty.
• Existing grading systems aid in assessing acetabular bone loss.
• Advancements in orthopedic research and bio-engineering have led to innovative techniques and devices for restoring hip anatomy.

Purpose of the Study:

• To review and evaluate the outcomes of various acetabular reinforcement rings used in cases of severe acetabular defects.
• To provide a comprehensive report on multiple surgical techniques from existing literature.

Main Methods:

• Literature review focusing on acetabular reinforcement rings for severe bone defects.
• Analysis of techniques including cup-cage, Müller ring, Ganz Ring, Kerboull acetabular reinforcement device (KARD), graft augmentation prosthesis (GAP) ring, and Burch-Schneider ring.
• Exclusion of other devices like trabecular augments, custom cages, or oblong cups.
• Specific emphasis on the surgical technique of the KARD device.

Main Results:

• Procedures involving these rings often utilize bulk or morselized bone grafts.
• The cup-cage, KARD, and Burch-Schneider ring demonstrated reliability in available data.
• These selected rings are considered effective for reconstructing severely damaged acetabulums.

Conclusions:

• The cup-cage, KARD, and Burch-Schneider ring are identified as dependable options for acetabular reconstruction in severe bone defects.
• These devices, often used with bone grafting, contribute to successful long-term outcomes in challenging revision hip arthroplasty.