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Abstract #0077

Correlation of MRI Appearance of Total Hip Arthroplasty With Wear Metric and Histologic Evaluation

Matthew F. Koff1, Parina H. Shah1, Mauro Miranda1, Christina Esposito2, Elexis Baral2, Kara Fields3, Thomas Bauer4, HSS Adult Reconstruction & Joint Replacement Division5, Douglass Padgett5, Timothy Wright2, and Hollis G. Potter1

1Department of Radiology and Imaging - MRI, Hospital for Special Surgery, New York, NY, United States, 2Department of Biomechanics, Hospital for Special Surgery, New York, NY, United States, 3Healthcare Research Institute, Hospital for Special Surgery, New York, NY, United States, 4Cleveland Clinic Foundation, Cleveland, OH, United States, 5Adult Reconstruction and Joint Replacement Division, Hospital for Special Surgery, New York, NY, United States

A majority of primary total hip arthroplasty (THA) function well but implant failure may occur. We propose MRI to evaluate adverse local tissue reactions (ALTRs) in patients with THA. In this study, we correlate indirect measures of ALTRs with direct measurements of implant wear. Greater volumetric wear and visual damage was found in subjects with ALTR on MR images. MR also correlated with histologic metrics of implant wear. The results indicate that MRI allows for accurate diagnosis of different synovial patterns in THA, which correlate to wear analysis at retrieval.

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