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Case report
Fatigue fracture of an uncemented Zweymüller femoral stem at the neck–shoulder junction
  1. Thijs Andreas Nijenhuis1,
  2. Stijn Albertus Andreas Nicolaas Bolink2 and
  3. Roy Bernardus Gerardus Brokelman3
  1. 1Zuyderland Medical Centre Sittard-Geleen, Sittard-Geleen, Limburg, The Netherlands
  2. 2Department of Orthopaedics, Deventer Hospital, Deventer, The Netherlands
  3. 3Orthopedisch Centrum Oost Nederland OCON, Hengelo, The Netherlands
  1. Correspondence to Dr Roy Bernardus Gerardus Brokelman; R.brokelman{at}ocon.nl

Abstract

A fracture through the neck of the femoral stem in total hip arthroplasty is extremely rare. We report a neck fracture of a cementless Zweymüller stem, one of the most implanted stems worldwide. According to our knowledge, this is the first thorough case description of a neck fracture of a cementless Zweymüller stem. The case concerns a 53-year-old man, with a body weight of 103 kg and a body mass index of 31. We consider potential risk factors for a femoral stem fracture, such as patient-related factors, suboptimal implant positioning, surgical technique and implant characteristics.

  • hip implants
  • prosthesis failure
  • hip prosthesis implantation
  • orthopaedic and trauma surgery

https://doi.org/10.1136/bcr-2020-236328

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    Footnotes

    • Contributors TAN, SAANB and RBGB contributed to the design and implementation of the research, to the analysis of the results and to the writing of the manuscript.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Competing interests None declared.

    • Patient consent for publication Obtained.

    • Ethics approval The study was approved by the local ethics review board.

    • Provenance and peer review Not commissioned; externally peer-reviewed.