Fig. (1) Particles were characterized by using low angle laser light scattering (LALLS) where millions of particles dispersed in liquid (double distilled water or ethanol) are counted to determine the size of (a) CoCrMo and (b) UHMWPE particles. Scanning Electron Microscopy (SEM) (insets) image analysis was used to determine size and shape (aspect ratio). CoCrMo and UHMWPE particles had median diameters of 0.88 µm and 0.95 µm ECD number-based, respectively (non Gaussian distributions). Note: Axis for % of particles in each size (bars) is on the right hand side.