Mean coefficient of friciton of UHMWPE-on-CoCr and UHMWPE-on-PEEK.  The values given are from 6 different bearing couples which were each tested 3 times and the average taken.  All tests were carried out under rig temperature conditions, data associated with 'Wear and Friction of UHMWPE-on-PEEK-OPTIMA' paper.									
									
CoCr					PEEK				
0% serum	2% serum	5% serum	25% serum	90% serum	0% serum	2% serum	5% serum	25% serum	90% serum
0.100	0.101	0.081	0.074	0.014	0.120	0.148	0.128	0.125	0.064
0.087	0.100	0.096	0.065	0.012	0.095	0.129	0.139	0.142	0.111
0.070	0.061	0.099	0.081	0.065	0.095	0.158	0.137	0.140	0.146
0.078	0.078	0.078	0.083	0.080	0.129	0.177	0.168	0.161	0.155
0.035	0.038	0.026	0.019	0.014	0.106	0.135	0.137	0.061	0.056
0.081	0.085	0.084	0.091	0.059	0.137	0.144	0.132	0.121	0.127