Results of onlay allografts

Area of Science:

• Orthopedic Surgery
• Bone Grafting Techniques
• Revision Arthroplasty

Background:

• Femoral structural deficiency presents challenges in revision hip arthroplasty.
• Restoring bone stock is critical for successful revision surgery outcomes.
• Cortical onlay strut allografts offer a potential solution for significant bone loss.

Purpose of the Study:

• To evaluate the efficacy and reliability of cortical onlay strut allografts in femoral revision surgery.
• To assess graft union, complication rates, and functional outcomes in patients receiving these grafts.

Main Methods:

• A retrospective review of 251 patients undergoing femoral revision with cortical onlay bone grafts between 1986 and 1990.
• Follow-up ranged from 8 to 12 years (average 9.5 years).
• Assessment of graft union, revision rates, complications, and Harris hip scores.

Main Results:

• Allografts achieved successful union with the host bone in 100% of cases.
• A low revision rate of 3% was observed, with no graft-related complications.
• Significant improvement in average Harris hip scores by 45 points.

Conclusions:

• Cortical onlay strut allografts are a reliable and effective method for bone restoration in femurs with structural deficiency during revision surgery.
• The technique facilitates graft union and remodeling, leading to improved functional outcomes.
• This approach offers a viable solution for complex femoral bone defects in revision arthroplasty.