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|Title:||Fractures of modern high nitrogen stainless steel cemented stems|
|Citation:||Journal of Arthroplasty, 2008; 23(2):188-196|
|Publisher:||Churchill Livingstone Inc Medical Publishers|
|Piers J. Yates, Nasir A. Quraishi, Allan Kop, Donald W. Howie, Clare Marx and Eric Swarts|
|Abstract:||We present 14 cases of fracture of modern, high-nitrogen, stainless steel stems. Our clinical and radiological data suggest that heavy patients with small stems and poor proximal support are at risk for fracturing their implants. “Champagne-glass” canals can lead to the use of smaller stems often placed in varus, which can lead to cantilever bending and fatigue failure in the distal half of the stem. Metallurgical assessment of the retrieved high-nitrogen, stainless steel stems reveals microstructural inconsistencies that may contribute to their failure. Based on our findings, careful consideration and attention to technique is required when using stainless steel stems in patients with high body mass index or high weight. Technique is particularly important in femurs with champagne-glass canals.|
|Keywords:||stainless steel; hip arthroplasty; fracture; high nitrogen; cement|
|Description:||Copyright © 2008 Elsevier Inc. All rights reserved.|
|Appears in Collections:||Orthopaedics and Trauma publications|
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