Data associated with Figure 7. The mean graft protrusion from the cartilage surface (mm) with 95% confidence limits pre-test and following 3 hours wear simulation. pre-test 3 hours mean 95% CL mean 95% CL 4-6 month animals n=6 Positive control (stainless steel pin 1mm proud) 0.970 0.183 0.282 0.051 n=6 Osteochondral graft 1mm proud 1.421 0.376 0.522 0.284 n=5 Osteochondral graft flush 0.302 0.232 0.004 0.152 12 month animals n=5 Positive control (stainless steel pin 1mm proud) 1.234 0.305 0.803 0.539 positive control osteochondral graft 1mm proud osteochondral graft flush Positive control older animals pre test 3 hours pre test 3 hours pre test 3 hours pre test 3 hours 0.822875 0.299 1.424625 0.471125 98.381375 -90.7525 1.008875 0.568625 0.856625 0.3165 1.4055 0.584 251.428125 -81.820625 1.14 1.0695 1.101 0.229325 1.276625 0.384375 364.532125 1.590125 1.5315 0.68575 0.79425 0.263625 0.92975 0.3875 204.35375 -19.10875 1.028375 0.227125 1.229875 0.232875 2.035 1.032125 0.589375 0.21175 1.459 1.462 1.01625 0.351875 1.456875 0.270375