Abstract
This work discusses the wear behaviour of two different ultra-high-molecular-weight-polyethylene tibial component designs. Mobile and fixed bearings were tested on a knee wear simulator for 5 million cycles using bovine calf serum as lubricant. We correlated the wear results with the chemical characterisation of the investigated materials: Fourier Transformed Infra Red Spectroscopy analyses, Differential Scanning Calorimetry and cross-link density measurements were used to assess the chemical features of this polyethylene. Mobile and fixed polyethylene inserts showed a different wear behaviour: the mobile designs components showed lower weight losses than the fixed components (109 ± 6 mg and 163 ± 80 mg, respectively). Significant statistical differences were observed in wear rate (P = 0.035, Kolmogorov-Smirnov Test for two samples). From a molecular point of view, typical radiation-induced oxidation profiles were observed in all the tested polyethylene samples, but the overall degradation was more significant in the fixed bearing inserts and this is likely to play a role on the wear performances.
| Original language | English |
|---|---|
| Pages (from-to) | 44-51 |
| Number of pages | 8 |
| Journal | Materials and Design |
| Volume | 48 |
| DOIs | |
| Publication status | Published - 2013 |
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Keywords
- Crystallinity
- Fixed TKR
- FTIR analyses
- Mobile TKR
- Wear
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
Cite this
In vitro wear assessments of fixed and mobile UHMWPE total knee replacement. / Affatato, Saverio; Bracco, Pierangiola; Sudanese, Alessandra.
In: Materials and Design, Vol. 48, 2013, p. 44-51.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - In vitro wear assessments of fixed and mobile UHMWPE total knee replacement
AU - Affatato, Saverio
AU - Bracco, Pierangiola
AU - Sudanese, Alessandra
PY - 2013
Y1 - 2013
N2 - This work discusses the wear behaviour of two different ultra-high-molecular-weight-polyethylene tibial component designs. Mobile and fixed bearings were tested on a knee wear simulator for 5 million cycles using bovine calf serum as lubricant. We correlated the wear results with the chemical characterisation of the investigated materials: Fourier Transformed Infra Red Spectroscopy analyses, Differential Scanning Calorimetry and cross-link density measurements were used to assess the chemical features of this polyethylene. Mobile and fixed polyethylene inserts showed a different wear behaviour: the mobile designs components showed lower weight losses than the fixed components (109 ± 6 mg and 163 ± 80 mg, respectively). Significant statistical differences were observed in wear rate (P = 0.035, Kolmogorov-Smirnov Test for two samples). From a molecular point of view, typical radiation-induced oxidation profiles were observed in all the tested polyethylene samples, but the overall degradation was more significant in the fixed bearing inserts and this is likely to play a role on the wear performances.
AB - This work discusses the wear behaviour of two different ultra-high-molecular-weight-polyethylene tibial component designs. Mobile and fixed bearings were tested on a knee wear simulator for 5 million cycles using bovine calf serum as lubricant. We correlated the wear results with the chemical characterisation of the investigated materials: Fourier Transformed Infra Red Spectroscopy analyses, Differential Scanning Calorimetry and cross-link density measurements were used to assess the chemical features of this polyethylene. Mobile and fixed polyethylene inserts showed a different wear behaviour: the mobile designs components showed lower weight losses than the fixed components (109 ± 6 mg and 163 ± 80 mg, respectively). Significant statistical differences were observed in wear rate (P = 0.035, Kolmogorov-Smirnov Test for two samples). From a molecular point of view, typical radiation-induced oxidation profiles were observed in all the tested polyethylene samples, but the overall degradation was more significant in the fixed bearing inserts and this is likely to play a role on the wear performances.
KW - Crystallinity
KW - Fixed TKR
KW - FTIR analyses
KW - Mobile TKR
KW - Wear
UR - http://www.scopus.com/inward/record.url?scp=84892850583&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84892850583&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2012.11.046
DO - 10.1016/j.matdes.2012.11.046
M3 - Article
AN - SCOPUS:84892850583
VL - 48
SP - 44
EP - 51
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
ER -