Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Case Reports
. 2022 Nov;56(6):408-411.
doi: 10.5152/j.aott.2022.22051.

Trunnion fracture of a cobalt-chrome fully porous-coated femoral stem: A case report

Mustafa Kavak  1 , Akın Turgut  1
Affiliations
Case Reports

Trunnion fracture of a cobalt-chrome fully porous-coated femoral stem: A case report

Mustafa Kavak et al. Acta Orthop Traumatol Turc. 2022 Nov.

Abstract

Modular femoral stem-head systems are used increasingly due to their ease of application and offset adjustment. However, this modular ity has brought complications of trunnion wear and breakage. Although very rarely encountered, trunnion fracture is a catastrophic com plication that requires challenging revision surgery. This report presents a trunnion fracture of a cobalt-chrome alloy, fully porous-coated femoral stem. Following single-stage revision surgery, full weight-bearing was achieved in six weeks, and the patient was painlessly mobile with a single cane and had a Hip Score of 81 in the last follow-up. Despite all the advantages of the femoral stem and head modu larity, one should remember that a catastrophic complication such as trunnion wear and fracture that require revision surgery is possible.

PubMed Disclaimer

Figures

Figure 1.
Figure 1.
Preoperative radiological image: dissociation of the femoral stem and head.
Figure 2.
Figure 2.
Trunnion fracture of the femoral stem.
Figure 3.
Figure 3.
The femoral stem and the trunnion fracture surface.
Figure 4.
Figure 4.
Postoperative x-ray image: revision of the femoral stem and fixation of the trochanteric osteotomy.
See this image and copyright information in PMC

References

    1. The National Joint Registry for England, Wales, Northern Ireland, the Isle Of Man, and the States of Guernsey: 15th Annual Report 2018. Available at: https://reports.njrcentre.org.uk/Portals/0/PDFdownloads/NJR%2015th%20Ann... Accessed January 28, 2019.
    1. Chang CH, Lin PC, Shih CM, Chen CC, Hsieh PH, Shih HN. Fracture of cobalt chrome, fully-coat beaded femoral revision long stem, a clinical outcomes study. Biomed J. 2018;41(1):46 51. 10.1016/j.bj.2018.02.001) - DOI - PMC - PubMed
    1. Busch CA, Charles MN, Haydon CM.et al. Fractures of distally-fixed femoral stems after revision arthroplasty. J Bone Joint Surg Br. 2005;87(10):1333 1336. 10.1302/0301-620X.87B10.16528) - DOI - PubMed
    1. Zhu L, He R. Non-contemporaneous bilateral stem fractures occurring after staged bilateral hip revision using extensively porous-coated cylindrical femoral stems: a case report. BMC Musculoskelet Disord. 2019;20(1):112. 10.1186/s12891-019-2489-0) - DOI - PMC - PubMed
    1. Landa J, Benke M, Dayan A, Pereira G, Di Cesare PE. Fracture of fully coated echelon femoral stems in revision total hip arthroplasty. J Arthroplasty. 2009;24(2):322.e13 322.e18. 10.1016/j.arth.2007.12.010) - DOI - PubMed

Publication types