Acetabular preparation in cementless revision total hip arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Arthroplasty

Background:

• Acetabular revision arthroplasty addresses complex hip joint reconstruction.
• Cementless, porous implants aim for biological fixation and bone preservation.
• Grafting techniques are crucial for managing significant acetabular bone defects.

Purpose of the Study:

• To present the rationale and early outcomes of using the Harris-Galante prosthesis for acetabular revision.
• To evaluate the efficacy of bone grafting (allograft and autograft) with this implant system.
• To assess implant fixation and bone integration in cases of severe acetabular deficiency.

Main Methods:

• Retrospective analysis of 75 acetabular revision cases using the Harris-Galante prosthesis.
• Utilized cementless, hemispherical, microporous sockets with bone grafting.
• Radiographic evaluation for fixation, resorption, lucencies, and bone graft appearance.

Main Results:

• No loss of implant fixation observed in any case.
• Mild to major resorption occurred in non-contained bone grafts.
• Favorable radiographic appearance of contained bone grafts, but high graft-porous interface lucencies suggest limited bone ingrowth.
• No discernible radiographic differences between allograft and autograft.

Conclusions:

• The Harris-Galante prosthesis is a successful approach for acetabular revision, particularly in severely deficient acetabulae (Type III).
• While providing stable fixation, bone ingrowth into grafted regions appears limited.
• Further investigation into optimizing bone integration with graft materials is warranted.