Data associated with Figure 6. The mean wear volume (mm3) with 95% confidence limits of cartilage on the femoral trochlear after 3 hours wear simulation. mean 95% CL 4-6 month animals n=6 Positive control (stainless steel pin 1mm proud) 14.237 7.386 n=6 Osteochondral graft 1mm proud 2.004 3.850 12 month animals n=5 Positive control (stainless steel pin 1mm proud) 43.263 25.377 positive control osteochondral graft 1mm proud positive control 12 month animals 6.3424 2.463333333 35.903 16.624 0 57.737 26.557 0 53.81466667 12.55366667 0 10.55233333 14.10366667 9.463 58.30766667 9.240933333 0.097333333