Fatigue Fracture in Dual Modular Revision Total Hip Arthroplasty Stems: Failure Analysis and Computed Tomography Diagnostics in Two Cases.
Research output: Contribution to journal › Article
We report on two patients with fracture of a modular, tapered and distally fixed, uncemented titanium revision hip stem, not previously described. A failure analysis revealed that the cause of the fractures was the development of fatigue cracks in the mid-stem cobalt-chromium modular junction ending in corrosion-fatigue failure. No material defects or stress risers were found in any of the implants. The diameter of the mid-stem modular junction might be undersized for use in heavy and active patients. We also report a new way of detecting an undisplaced fracture at the modular junction, using the scout image from a computed tomography (CT) scan; a technique that can be used when plain radiographs are inconclusive.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||Journal of Arthroplasty|
|Publication status||Published - 2014|