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- W3207108002 abstract "Intramedullary beaming is a surgical option for medial column arthrodesis; however, disagreement exists about which beam design should be used. This computational study aimed to analyze the effects that common beam parameters have on medial column arthrodesis using a set of 5 subject-specific finite element models. A full-factorial design of experiments was conducted with 3 factors: implant stiffness (114 GPa Titanium vs 193 GPa Stainless Steel), threaded portion (25 mm Partially Threaded vs 130 mm Fully Threaded) and cannulation (Cannulated vs Solid). Increasing implant stiffness, threaded portion and using a solid beam all significantly increased medial column stiffness from 13.9 to 20.0 N/mm (p < .001), 15.2 to 18.8 N/mm (p = .001) and 13.6 to 20.4 N/mm (p < .001), respectively. Moreover, simultaneously increasing all 3 factors resulted in a 172% increase in medial column stiffness, as well as a 33% decrease in maximum von-Mises stress, 70% decrease in strain energy and 44% decrease in the average normal force in the implant during bending; all of which were significant. There was no significant increase in contact area in any of the joints, but there was a significant decrease in micromotion in each joint, ranging from 63% to 66%. Based on the parameters tested, a stainless steel, fully threaded (design that can apply compression), solid intramedullary device would produce the most stable construct for medial column arthrodesis under ideal conditions. Future studies simulating neuropathic conditions are needed before clinical use; however, this study shows the potential benefits of altering the implant design." @default.
- W3207108002 created "2021-10-25" @default.
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- W3207108002 date "2021-10-01" @default.
- W3207108002 modified "2023-09-27" @default.
- W3207108002 title "Analysis of Intramedullary Beam Designs Using Customized Finite Element Models for Medial Column Arthrodesis of the Foot" @default.
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- W3207108002 doi "https://doi.org/10.1053/j.jfas.2021.10.002" @default.
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