Figure 4.

Box plot using the Tukey method representing the ICRS II histological scoring of the different biopsy sites. L-MFC of the biologic implant group had a significantly higher yield compared to L-MFC of the synthetic implant group (a/b: P < 0.02). No statistical significance was found between different predetermined levels of the repair tissue (anterior, middle, posterior) or between the different treatment groups. For both treatment groups, L-MFC had a significantly lower yield than R-MFC (a/c: P < 0.01; b/c: P < 0.0001). ICRS = International Cartilage Repair Society score; L-MFC = left medial femoral condyle; R-MFC = right medial femoral condyle.