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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