NDLI: Fatigue fracture in dual modular revision total hip arthroplasty stems: failure analysis and computed tomography diagnostics in two cases.

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Fatigue fracture in dual modular revision total hip arthroplasty stems: failure analysis and computed tomography diagnostics in two cases.

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Fatigue fracture in dual modular revision total hip arthroplasty stems: failure analysis and computed tomography diagnostics in two cases.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Norman, Pontus Iyengar, Srinivasan Svensson, Ingrid Flivik, Gunnar
Description	Country affiliation: Sweden Author Affiliation: Norman P ( Department of Orthopaedics, Skane University Hospital, Clinical Sciences, Lund University, Lund, Sweden.); Iyengar S ( Division of Materials Engineering, Lund University, Lund, Sweden.); Svensson I ( Division of Solid Mechanics, Lund University, Lund, Sweden.); Flivik G ( Department of Orthopaedics, Skane University Hospital, Clinical Sciences, Lund University, Lund, Sweden.)
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.
File Format	HTM / HTML
ISSN	08835403
Issue Number	4
Volume Number	29
e-ISSN	15328406
Journal	The Journal of Arthroplasty
Language	English
Publisher	Elsevier
Publisher Date	2014-04-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Orthopedics Hip Prosthesis Adverse Effects Prosthesis Failure Aged Arthroplasty, Replacement, Hip Biocompatible Materials Chromium Alloys Corrosion Equipment Failure Analysis Humans Male Prosthesis Design Reoperation Stress, Mechanical Tomography, X-ray Computed Case Reports Journal Article
Content Type	Text
Resource Type	Article Case study
Subject	Orthopedics and Sports Medicine

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