The Ra, Rp and Rv of each femoral component measured in a medial-lateral direction using a contacting form talysurf with a 2 micron tip stylus. The data was analysed using a gaussian filter, LS Arc form removal, 0.25mm upper cutoff and 100:1 Bandwidth. Measurements were taken after 0.115 and 3MC and are shown in Table 1. Ra 0.115MC 3MC Sample Negative control CS-BVF Positive control Negative control CS-BVF Positive control 1 0.0203875 0.029275 0.36505 0.107175 0.07045 0.3826 2 0.0308 0.017475 0.4719625 0.090475 0.0498625 0.4391 3 0.02015 0.0182875 0.4334375 0.051525 0.039575 0.47255 4 0.0179375 0.025075 0.44245 0.037975 0.1416 0.4760375 5 0.0164375 0.024975 0.4520625 0.030575 0.1258125 0.4801125 6 0.0148125 0.0215875 0.4156625 0.0257 0.1270375 0.4509625 mean 0.0200875 0.022779167 0.430104167 0.0572375 0.092389583 0.450227083 95% CL 0.005949003 0.004741101 0.03881678 0.035462608 0.046511924 0.038580433 Rp 0.115MC 3MC Sample Negative control CS-BVF Positive control Negative control CS-BVF Positive control 1 0.0359875 0.0298375 1.1699625 0.22665 0.1311 1.083275 2 0.0675 0.0292125 1.4441375 0.2067875 0.08855 1.3827375 3 0.0361875 0.030925 1.398 0.1149 0.0791625 1.5113125 4 0.0423625 0.037175 1.341475 0.09055 0.224725 1.4201125 5 0.028075 0.052775 1.345675 0.06045 0.1877375 1.4133 6 0.0379 0.03035 1.2636375 0.0530125 0.1469125 1.3530875 mean 0.041335417 0.035045833 1.327147917 0.125391667 0.14303125 1.3606375 95% CL 0.014302267 0.009608839 0.102835636 0.078065191 0.059146711 0.153177049 Rv 0.115MC 3MC Sample Negative control CS-BVF Positive control Negative control CS-BVF Positive control 1 0.0437875 0.03275 0.7255125 0.259575 0.185825 0.758075 2 0.077975 0.035625 0.9504125 0.2093 0.1351 0.8803125 3 0.0625 0.0531375 0.8846375 0.168425 0.136725 0.9788375 4 0.032975 0.045125 0.7887375 0.1095 0.327775 0.903075 5 0.0249625 0.052975 0.9138625 0.089525 0.378975 0.919325 6 0.027825 0.0320625 0.7666 0.06225 0.2774 0.8263125 mean 0.045004167 0.041945833 0.83829375 0.1497625 0.2403 0.87765625 95% CL 0.022196896 0.010275422 0.094749192 0.079742251 0.10808539 0.080707774