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Will New Metal Heads Restore Mechanical Integrity of Corroded Trunnions?

Overview of attention for article published in The Journal of Arthroplasty, October 2016
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Title
Will New Metal Heads Restore Mechanical Integrity of Corroded Trunnions?
Published in
The Journal of Arthroplasty, October 2016
DOI 10.1016/j.arth.2016.10.007
Pubmed ID
Authors

Aditya Derasari, Jonathan E Gold, Sabir Ismaily, Philip C Noble, Stephen J Incavo

Abstract

Metal wear and corrosion from modular junctions in total hip arthroplasty can lead to further unwanted surgery. Trunnion tribocorrosion is recognized as an important contributor to failure. This study was performed to determine if new metal heads restore mechanical integrity of the original modular junction after impaction on corroded trunnions, and assess which variables affect stability of the new interface created at revision total hip arthroplasty. Twenty-two trunnions, cobalt-chromium (CoCr) and titanium alloy (TiAIV), (CoCr, n = 12; TiAIV, n = 10) and new metal heads were used, 10 trunnions in pristine condition and 12 with corrosion damage. Test states were performed using an MTS Machine and included the following: 1, Assembly; 2, Disassembly; 3, Assembly; 4, Toggling; and 5, Disassembly. During loading, three-dimensional motion of the head-trunnion junction was measured using a custom jig. There were no statistical differences in the tested mechanical properties between corroded and pristine trunnions implanted with a new metal femoral head. Average micromotion of the head versus trunnion interface was greatest at the start of loading, stabilizing after approximately 50 loading cycles at an average of 30.6 ± 3.2 μm. Corrosion at the trunnion does not disrupt mechanical integrity of the junction when a CoCr head is replaced with a CoCr trunnion. However, increased interface motion of a new metal head on a corroded titanium trunnion requires additional study. The evaluation of ball head size on mechanical integrity of trunnions would also be a potential subject of future investigation, as increasing the ball head size at the time of revision is not uncommon in revisions today.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 19 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 19 100%

Demographic breakdown

Readers by professional status Count As %
Student > Doctoral Student 4 21%
Researcher 4 21%
Student > Master 3 16%
Student > Ph. D. Student 2 11%
Other 1 5%
Other 1 5%
Unknown 4 21%
Readers by discipline Count As %
Engineering 7 37%
Medicine and Dentistry 5 26%
Computer Science 1 5%
Materials Science 1 5%
Nursing and Health Professions 1 5%
Other 0 0%
Unknown 4 21%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 14 April 2017.
All research outputs
#20,656,161
of 25,373,627 outputs
Outputs from The Journal of Arthroplasty
#3,920
of 4,622 outputs
Outputs of similar age
#252,133
of 326,612 outputs
Outputs of similar age from The Journal of Arthroplasty
#46
of 65 outputs
Altmetric has tracked 25,373,627 research outputs across all sources so far. This one is in the 10th percentile – i.e., 10% of other outputs scored the same or lower than it.
So far Altmetric has tracked 4,622 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 7.9. This one is in the 6th percentile – i.e., 6% of its peers scored the same or lower than it.
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We're also able to compare this research output to 65 others from the same source and published within six weeks on either side of this one. This one is in the 12th percentile – i.e., 12% of its contemporaries scored the same or lower than it.