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).
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.
