Radiography versus multidetector computed tomography in assessing graft integration after acetabular reconstruction

Area of Science:

• Orthopedic Surgery
• Radiology
• Biomaterials Science

Background:

• Failed total hip arthroplasty (THA) often necessitates acetabular reconstruction using structural allografts.
• Accurate evaluation of graft integration is critical for long-term implant survival and patient function.
• Radiography is the standard imaging modality, but its ability to assess graft integration may be limited.

Purpose of the Study:

• To compare the diagnostic accuracy of multidetector computed tomography (MDCT) versus conventional radiography.
• To evaluate graft integration following acetabular reconstruction in patients with failed THA.

Main Methods:

• Retrospective review of 11 patients (5 male, 6 female; mean age 71.8 years) undergoing acetabular reconstruction with structural allografts.
• Allografts were used for severe acetabular deficiency due to aseptic or septic loosening.
• Graft integration, cup loosening, and resorption were assessed using both radiography and MDCT.

Main Results:

• Acetabular reconstruction survival was 90.9% at a mean follow-up of 4.2 years.
• Radiography indicated graft integration in all patients, but MDCT revealed complete integration in only one patient.
• MDCT showed partial or absent graft integration in 9 out of 10 patients evaluated for integration, highlighting discrepancies with radiographic findings.

Conclusions:

• Multidetector computed tomography (MDCT) demonstrates superior accuracy compared to radiography in assessing graft integration post-acetabular reconstruction.
• MDCT provides more detailed information on the extent of graft integration, which is crucial for understanding reconstruction success.