Imperial College London
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Angela Kedgley

Faculty of Engineering, Department of Bioengineering

Reader in Orthopaedic Biomechanics
 
 
 
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Contact

 

+44 (0)20 7594 0747a.kedgley Website

 
 
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Location

 

514BSir Michael Uren HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sehjal:2023:10.1016/j.jhsa.2022.12.010,
author = {Sehjal, R and Rusli, W and Kedgley, A and Sagmeister, M and Williamson, M and Smith, A},
doi = {10.1016/j.jhsa.2022.12.010},
journal = {The Journal of Hand Surgery},
title = {Biomechanical comparison of 5 different fixation constructs in a trapeziometacarpal joint arthrodesis model},
url = {http://dx.doi.org/10.1016/j.jhsa.2022.12.010},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Purpose:Trapeziometacarpal joint (TMC) arthrodesis has a high rate of nonunion. This biomechanical analysis sought to determine the stiffness of 5 fixation methods in a TMC joint arthrodesis model.Methods:Five fixation constructs were tested in a validated porcine model: crossed 1.1-mm K-wires, crossed 1.6-mm K-wires, crossed headless compression screws (HCSs), compression plating (CP), and locked compression plating (LCP). The cantilever bending stiffness was measured in abduction, adduction, flexion, and extension. Samples were loaded to failure in extension, and the mode of failure was examined.Results:The crossed HCSs performed consistently well in all tests. Loading to failure resulted in screw pullout. In abduction and adduction, HCS and 1.6-mm K-wires were significantly stiffer than the other constructs. The mean load to failure in extension was similar in the HCS, CP, and LCP groups (304 N/mm, 311 N/mm, and 293 N/mm, respectively). There were no differences between CP and LCP in any biomechanical tests, and the mode of failure was through plate bending. The crossed 1.1-mm K-wires performed poorly in all tests.Conclusions:Crossed HCS displayed the greatest overall stability. Standard plating in compression mode and LCP had a similar biomechanical performance.Clinical relevance:The ideal construct stiffness required for the successful union after TMC joint arthrodesis is unknown, but HCS has the best overall biomechanical performance and, therefore, might be considered the best choice for this clinical setting.
AU  - Sehjal,R
AU  - Rusli,W
AU  - Kedgley,A
AU  - Sagmeister,M
AU  - Williamson,M
AU  - Smith,A
DO  - 10.1016/j.jhsa.2022.12.010
PY  - 2023///
SN  - 0363-5023
TI  - Biomechanical comparison of 5 different fixation constructs in a trapeziometacarpal joint arthrodesis model
T2  - The Journal of Hand Surgery
UR  - http://dx.doi.org/10.1016/j.jhsa.2022.12.010
UR  - http://hdl.handle.net/10044/1/102647
ER  -
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