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Abstract #1257

Magnetic Resonance Imaging Findings in a Dual Taper, Modular Total Hip Arthroplasty

Matthew F. Koff 1 , Stephanie L. Gold 1 , Brett Lurie 1 , Danyal H. Nawabi 1 , Geoffrey Westrich 1 , and Hollis G. Potter 1

1 Hospital for Special Surgery, New York, NY, United States

Wear of at the neck-stem junction in modular total hip arthroplasty is associated with adverse local tissue reaction (ALTR) and premature implant failure. This study identified MR imaging findings characteristic of a failing modular THA system and determined which are most indicative of an ALTR, as confirmed by histology following revision arthroplasty. A majority (60%) of symptomatic hips had a moderate to severe ALTR. Synovial thickness was positively correlated with histologic scoring ( lower case Greek rho = 0.734, p<0.0003). Using MRI to measure synovial thickness may identify a premature failing hip and help guide surgical management in patients with ALTR.

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