Fig. 2

Chondrogenic differentiation. a Cell viability evaluated after 10 days of culture in the presence or absence of autologous micrografts. The results are expressed as fold increase with respect to chondrocytes cultured without micrografts (= 1). b Alcian blue staining to evaluate the chondrogenic differentiation of cells cultured in the control or chondrogenic medium with or without autologous micrografts (magnification × 20). c GAGs deposition in cells cultured in the control or chondrogenic medium with or without autologous micrografts (**p < 0.01, ***p < 0.001 vs cells in the control medium without micrografts; ## p < 0.01 vs cells in the chondrogenic medium without micrografts)