Fig. 4From: The enhancement of cartilage regeneration by use of a chitosan-based scaffold in a 3D model of microfracture in vitro: a pilot evaluationSome week positive signals for SOX-9 stained cells in the newly formed cartilage matrix from the digested particulated cartilage (marked with black arrow, well 10). Minced cartilage in the middle (marked with white arrow). Poor adhesion of the newly formed matrix with the piece of cartilageBack to article page