The three-dimensional morphology of the wear tracks on the
UHMWPE discs is shown in Fig. 4. It was found that the wear
tracks were all obvious regardless of the solvent and PVP concentration.
However, the comparison of the volume of the wear
tracks indicated that the wear volume under the 15 wt% PVP
concentration reduced significantly by 20% and 36% compared to
that under the 0 wt% PVP concentration with deionized water and
bovine serum solution, respectively (shown in Fig. 5).