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 (37.872.8 mg and 19.4670.93 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).
S. Affatato, L. Grillini, S. Battaglia, P. Taddei, E. Modena, A. Sudanese (2013). Does knee implant size affect wear variability?. TRIBOLOGY INTERNATIONAL, 66, 174-181 [10.1016/j.triboint.2013.05.008].
Does knee implant size affect wear variability?
TADDEI, PAOLA;MODENA, ENRICO;
2013
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 (37.872.8 mg and 19.4670.93 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).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
