@article{van:2018:10.1002/jor.23771,
author = {van, Arkel R and Ghouse, S and Milner, P and Jeffers, J},
doi = {10.1002/jor.23771},
journal = {Journal of Orthopaedic Research},
pages = {1508--1518},
title = {Additive manufactured push-fit implant fixation with screw-strength pull out},
url = {http://dx.doi.org/10.1002/jor.23771},
volume = {36},
year = {2018}
}

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TY  - JOUR
AB  - Additive manufacturing offers exciting new possibilities for improving long-term metallic implant fixation in bone through enabling open porous structures for bony ingrowth. The aim of this research was to investigate how the technology could also improve initial fixation, a precursor to successful long-term fixation. A new barbed fixation mechanism, relying on flexible struts was proposed and manufactured as a push-fit peg. The technology was optimized using a synthetic bone model and compared with conventional press-fit peg controls tested over a range of interference fits. Optimum designs, achieving maximum pull-out force, were subsequently tested in a cadaveric femoral condyle model. The barbed fixation surface provided more than double the pull-out force for less than a third of the insertion force compared to the best performing conventional press-fit peg (p < 0.001). Indeed, it provided screw-strength pull out from a push-fit device (1,124 ± 146 N). This step change in implant fixation potential offers new capabilities for low profile, minimally invasive implant design, while providing new options to simplify surgery, allowing for one-piece push-fit components with high levels of initial stability.
AU  - van,Arkel R
AU  - Ghouse,S
AU  - Milner,P
AU  - Jeffers,J
DO  - 10.1002/jor.23771
EP  - 1518
PY  - 2018///
SN  - 0736-0266
SP  - 1508
TI  - Additive manufactured push-fit implant fixation with screw-strength pull out
T2  - Journal of Orthopaedic Research
UR  - http://dx.doi.org/10.1002/jor.23771
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/jor.23771
VL  - 36
ER  - 

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