Fatigue Fracture in Dual Modular Revision Total Hip Arthroplasty Stems: Failure Analysis and Computed Tomography Diagnostics in Two Cases.

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Bibtex

@article{eec166ac23364371b6f638bf6fb4e0f3,
title = "Fatigue Fracture in Dual Modular Revision Total Hip Arthroplasty Stems: Failure Analysis and Computed Tomography Diagnostics in Two Cases.",
abstract = "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.",
author = "Pontus Norman and Srinivasan Iyengar and Ingrid Svensson and Gunnar Flivik",
year = "2014",
doi = "10.1016/j.arth.2013.09.008",
language = "English",
volume = "29",
pages = "850--855",
journal = "Journal of Arthroplasty",
issn = "0883-5403",
publisher = "Elsevier",
number = "4",

}