Acetabular Cup Revision Arthroplasty Using Morselized Impaction Allograft

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Regenerative Medicine

Background:

• Rising rates of acetabular cup revision arthroplasty due to osteolysis and loosening.
• Increasing life expectancy necessitates long-term implant survival.
• Challenges in achieving stable fixation for severe acetabular bone defects (Paprosky type 3+).

Purpose of the Study:

• To review conventional surgical techniques for acetabular revision.
• To verify the utility of using morselized and structural allografts for bone defect reconstruction.
• To analyze the author's surgical methods and discuss long-term outcomes.

Main Methods:

• Acetabular revision using morselized impacted allografts (irradiated frozen-stored femoral heads).
• Application of allografts to acetabular bone defects followed by cementless cup insertion.
• Use of tri-cortical or structural allografts for enhanced fixation when primary fixation was insufficient.

Main Results:

• Long-term follow-up confirmed structural stability and bone incorporation of allografts.
• Successful management of large acetabular bone defects.
• Restoration of hip biomechanics and limb length.

Conclusions:

• Morselized impacted allografts are effective for reconstructing large acetabular bone defects.
• Allograft reconstruction provides stable fixation and promotes bone incorporation in revision hip arthroplasty.
• The described surgical approach offers a viable solution for complex acetabular revisions.