Fig. 1From: Autologous-cell-derived, tissue-engineered cartilage for repairing articular cartilage lesions in the knee: study protocol for a randomized controlled trialAllogeneic, acellular cartilage scaffolds. Scaffold pores exhibit a parallel arrangement, which is conducive to the growth of cells along the pores. Cells are arranged in a column during proliferation. Cells display a columnar arrangement in line with the normal structural arrangement of articular cartilage, which is conducive to the formation of normal articular cartilage. The pore structure of the oriented scaffold also allows the metabolism of cell nutrition. a Light microscope × 100. b Scanning electron microscope × 100Back to article page