SEM was used to assess the cartilage structure. Results of SEM (Fig. 9) showed obliteration of the matrix structure in protocol A at day 35 in comparison to native. Protocol B and C however showed preservation with a similar morphology to that of native.Figure 9Scanning electron microscopy of cartilage specimens (high magnification). (A) Native. (B) Protocol A, day 35. (C) Protocol B, day 14. (D) Protocol C, day 14.