Fig. 3

Cartilage defect samples. a: full-thickness defect; b: half-thickness defect. (Note: The yellow line shows the interface between artificial and host cartilage, and the right block part is a researched strain field). The location 1, 2, 3 represents the superficial zone of the host, interface and artificial tissue in repaired cartilage; The location 4, 5, 6 represents the middle zone of the host, interface and artificial tissue in repaired cartilage; The location 7, 8, 9 represents the deep zone of the host, interface and artificial tissue in repaired cartilage