Mean surface roughness (Ra, Rp and Rv) of cobalt chrome and PEEK-OPTIMA™ femoral components (n=3) after 3 million cycles testing under intermediate kinematics and 3 million cycles of testing under high kinematic conditions.  Each value is the average of 4 measurements taken within the flexion range of the study.			
Data for intermediate kinematics presented in Table 1, data for high kinematics presented in Table 3 of the manuscript.					
					
INTERMEDIATE KINEMATICS					
Ra					
	cobalt chrome			PEEK-OPTIMA™	
SAMPLE	Pre-test	Post-test		Pre-test	Post-test
1	0.024	0.052		0.018	0.274
2	0.023	0.024		0.018	0.185
3	0.023	0.024		0.019	0.143
					
					
Rp					
	cobalt chrome			PEEK-OPTIMA™	
SAMPLE	Pre-test	Post-test		Pre-test	Post-test
1	0.082	0.139		0.077	0.597
2	0.082	0.080		0.076	0.413
3	0.080	0.082		0.081	0.285
					
					
Rv					
	cobalt chrome			PEEK-OPTIMA™	
SAMPLE	Pre-test	Post-test		Pre	Post-test
1	0.063	0.139		0.067	1.233
2	0.062	0.071		0.065	1.055
3	0.058	0.066		0.073	0.877
					
					
					
					
HIGH KINEMATICS					
Ra					
	cobalt chrome			PEEK-OPTIMA™	
SAMPLE	Pre-test	Post-test		Pre-test	Post-test
1	0.052	0.032		0.274	0.252
2	0.024	0.033		0.185	0.195
3	0.024	0.026		0.143	0.151
					
					
Rp					
	cobalt chrome			PEEK-OPTIMA™	
SAMPLE	Pre-test	Post-test		Pre-test	Post-test
1	0.139	0.093		0.597	0.586
2	0.080	0.096		0.413	0.381
3	0.082	0.079		0.285	0.364
					
					
Rv					
	cobalt chrome			PEEK-OPTIMA™	
SAMPLE	Pre-test	Post-test		Pre	Post-test
1	0.139	0.097		1.233	0.765
2	0.071	0.104		1.055	0.537
3	0.066	0.080		0.877	0.513