Catastrophic Trunnion Failure in an Anatomic Titanium Alloy Stem

Introduction Certain titanium alloy stems have been shown to be susceptible to failure at the neck with catastrophic trunnion failure. Failure has been particularly noted in the single wedge Accolade 1 stem design. Other stems also used this alloy including the anatomic designed Citation stem. Metho...

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Bibliographic Details
Published in:Geriatric orthopaedic surgery & rehabilitation 2022-11, Vol.13, p.21514593221142726-21514593221142726
Main Authors: Pruitt, Benjamin P., Mears, Simon C, Apple, Andrew E., Stambough, Jeffrey B., Barnes, C. Lowry, Stronach, Benjamin M.
Format: Article
Language:English
Subjects:
Hip joint
Joint replacement surgery
Medical Student Corner
Surgical outcomes
Titanium alloys
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Summary:Introduction Certain titanium alloy stems have been shown to be susceptible to failure at the neck with catastrophic trunnion failure. Failure has been particularly noted in the single wedge Accolade 1 stem design. Other stems also used this alloy including the anatomic designed Citation stem. Methods This case series details 3 catastrophic failures of the TMZF version of the Citation femoral stem. Results Each of these failures appear to be attributed to cyclical wear of the TMZF trunnion against the cobalt chromium femoral head. Wear resulted in ultimate implant failure and significant metal debris in the joint capsule at the time of revision surgery. Discussion While surgeons are aware of the risk of catastrophic failure for the Accolade 1 stem, failure may similarly happen in the TMZF Citation stem. Surgeons should monitor these implants with care and discuss the potential for trunnion failure with their patients.
ISSN:2151-4593
2151-4585
2151-4593
DOI:10.1177/21514593221142726