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

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 ( = 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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