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Erschienen in: Clinical Orthopaedics and Related Research® 12/2014

01.12.2014 | Symposium: ABJS Carl T. Brighton Workshop on Implant Wear and Tribocorrosion of Total Joint Replacements

What is the Trouble With Trunnions?

verfasst von: Christina I. Esposito, PhD, Timothy M. Wright, PhD, Stuart B. Goodman, MD, PhD, Daniel J. Berry, MD, The Clinical, Biological and Bioengineering Study Groups from the Carl T. Brighton Workshop

Erschienen in: Clinical Orthopaedics and Related Research® | Ausgabe 12/2014

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Abstract

Background

Recent studies have attributed adverse local tissue reactions (ALTRs) in patients with total hip arthroplasties (THAs) to tribocorrosion debris generated by modular femoral stems. The presentations of ALTR are diverse, as are the causes of it, and the biological responses can be important reasons for failure after THA.

Question/purposes

(1) What clinical problems have been reported in patients with modular stems since 1988? (2) What THA design features are associated with tribocorrosion in taper junctions? (3) What are the microscopic and tribological characteristics of the debris produced at the taper junctions? (4) What are the cellular and immunological traits of the biological response to taper tribocorrosion debris?

Methods

We conducted a systematic review using MEDLINE and EMBASE-cited articles to summarize failure modes associated with modular femoral stems. One hundred sixty-two of 1043 articles reported on the clinical performances or failure modes attributed to modular femoral stems. There were 10 laboratory studies, 26 case reports, 13 Level IV, 94 Level III, 18 Level II, and one Level I of Evidence papers. To address the remaining questions, we did a second review of 524 articles. One hundred twenty-seven articles met the eligibility criteria, including 81 articles on design features related to tribocorrosion, 15 articles on corrosion debris characteristics, and 31 articles on the biological response to tribocorrosion debris.

Results

Sixty-eight of 162 studies reported failure attributed to modular femoral stems for one of these four modularity-related failure modes: tribocorrosion-associated ALTR, dissociation of a taper junction, stem fracture, and mismatch of a femoral head taper attached to a stem with a different trunnion size. The remaining 94 studies found no clinical consequences related to the presence of a taper junction. THA component features associated with tribocorrosion included trunnion geometry and large-diameter femoral heads. Solid tribocorrosion debris is primarily chromium-orthophosphate material of variable size and may be more biologically reactive than wear debris.

Conclusions

There has been an increase in publications describing ALTR around modular hip prostheses in the last 3 years. Implant design changes, including larger femoral heads and smaller trunnions, have been implicated, but there may also be more recognition of the problem by the orthopaedic community. Analyzing retrieved implants to understand the history of taper-related problems, designing clinically relevant in vitro corrosion tests to test modular junctions, and identifying biomarkers to recognize patients at risk of ALTR should be the focus of ongoing research to help surgeons avoid and detect tribocorrosion-related problems in joint replacements.
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Metadaten
Titel
What is the Trouble With Trunnions?
verfasst von
Christina I. Esposito, PhD
Timothy M. Wright, PhD
Stuart B. Goodman, MD, PhD
Daniel J. Berry, MD
The Clinical, Biological and Bioengineering Study Groups from the Carl T. Brighton Workshop
Publikationsdatum
01.12.2014
Verlag
Springer US
Erschienen in
Clinical Orthopaedics and Related Research® / Ausgabe 12/2014
Print ISSN: 0009-921X
Elektronische ISSN: 1528-1132
DOI
https://doi.org/10.1007/s11999-014-3746-z

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