Imperial College London
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DrUlrichHansen

Faculty of Engineering, Department of Mechanical Engineering

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+44 (0)20 7594 7061u.hansen

 
 
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714City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ajdari:2020:10.1016/j.jse.2019.09.041,
author = {Ajdari, N and Tempelaere, C and Masouleh, MI and Abel, R and Delfosse, D and Emery, R and Dini, D and Hansen, U},
doi = {10.1016/j.jse.2019.09.041},
journal = {Journal of Shoulder and Elbow Surgery},
pages = {1019--1029},
title = {Hemiarthroplasties: the choice of prosthetic material causes different levels of damage in the articular cartilage},
url = {http://dx.doi.org/10.1016/j.jse.2019.09.041},
volume = {29},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Background Hemiarthroplasty has clear advantages over alternative procedures and is used in 20% of all shoulder joint replacements. Because of cartilage wear, the clinical outcome of hemiarthroplasty is unreliable and controversial. This paper suggests that the optimal choice of prosthetic material may reduce cartilage degeneration and improve the reliability of the procedure. The specific objectives were to assess 3 materials and assess how the severity of arthritis might affect the choice of prosthetic material. Methods A CoCr alloy, an AL2O3 ceramic, and a polycarbonate urethane polymer (PCU) were mechanically tested against 5 levels of human osteoarthritic cartilage (from intact to severely arthritic, n = 45). A high friction coefficient, a decrease in Young's modulus, an increase in permeability, a decrease in relaxation time, an increase in surface roughness, and a disrupted appearance of the cartilage after testing were used as measures of cartilage damage. The biomaterial that caused minimal cartilage damage was defined as superior. Results The CoCr caused the most damage. This was followed by the AL2O3 ceramic, whereas the PCU caused the least amount of damage. Although the degree of arthritis had an effect on the results, it did not change the trend that CoCr performed worst and PCU the best. Discussion and Conclusion This study indicates that ceramic implants may be a better choice than metals, and the articulating surface should be as smooth as possible. Although our results indicate that the degree of arthritis should not affect the choice of prosthetic material, this suggestion needs to be further investigated.
AU  - Ajdari,N
AU  - Tempelaere,C
AU  - Masouleh,MI
AU  - Abel,R
AU  - Delfosse,D
AU  - Emery,R
AU  - Dini,D
AU  - Hansen,U
DO  - 10.1016/j.jse.2019.09.041
EP  - 1029
PY  - 2020///
SN  - 1058-2746
SP  - 1019
TI  - Hemiarthroplasties: the choice of prosthetic material causes different levels of damage in the articular cartilage
T2  - Journal of Shoulder and Elbow Surgery
UR  - http://dx.doi.org/10.1016/j.jse.2019.09.041
UR  - http://www.sciencedirect.com/science/article/pii/S1058274619307025
VL  - 29
ER  -
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