Abstract
Small and large sized-mobile inserts (i.e. size #2 and size #6) were tested on a knee wear simulator for 2 million cycles, using bovine calf serum as lubricant. Gravimetric and micro-Raman spectroscopic analyses were performed on polyethylene inserts. Roughness analysis was performed on the metallic components. The larger size, i.e. #6, had almost twice weight loss with respect to the smaller one, i.e. #2 (37.8±2.8 mg and 19.46±0.93 mg, respectively). Significant statistical differences were observed in wear rates (p=0.001, Kolmogorov-Smirnov test for two samples). Raman spectroscopy showed a greater increase in crystallinity for the smaller inserts: upon wear, the orthorhombic content (αo) significantly increased at the expense of the third phase content (αb).
Original language | English |
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Pages (from-to) | 174-181 |
Number of pages | 8 |
Journal | Tribology International |
Volume | 66 |
DOIs | |
Publication status | Published - 2013 |
Keywords
- Knee simulator
- Mobile TKR
- Raman spectroscopy
- Wear
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Surfaces, Coatings and Films
- Surfaces and Interfaces