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Author Notes:

Nick N. Patel, MD; George N. Guild III, MD; Greg A. Erens, MD Emory University School of Medicine, Department of Orthopaedic Surgery 59 Executive Park Dr NE, Atlanta, GA 30329

Direct inquires to Nick N. Patel, nnpatel6@gmail.com

The authors declare there are no disclosures regarding the publication of this paper.



  • Hip arthroplasty
  • trunnion failure

Femoral Head-Trunnion Dissociation in Metal-on-Polyethylene Total Hip Arthroplasty: A Unique Case Report


Journal Title:

Reconstructive Review


Volume 7, Number 4


, Pages 35-38

Type of Work:

Article | Final Publisher PDF


Background: Gross trunnion failure (GTF) after total hip arthroplasty is a rare complication and has only been reported in a few case series. Some of the associated risk factors have been described in the literature and include larger femoral heads, greater offset, and increased BMI. Despite this, the mechanism behind GTF is poorly understood and early diagnosis and treatment continues to be challenging. Case Presentation: We present the case of complete femoral head and trunnion dissociation in a 63 year-old female nine years after total hip arthroplasty. Unique to this case is the lack of classic patient and implant risk factors for GTF along with the acute onset nearly nine years after implantation. Discussion: This case presentation highlights the fact that the contributing factors and mechanism behind GTF continue to be poorly understood. There is a need for future research to help better understand this phenomenon and to help potentially identify those at risk for GTF.

Copyright information:

© 2017 Patel, Guild, Erens. All rights reserved.

This is an Open Access work distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/).

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