2. Autologous cartilage in chin pad materials generally comes from rib cartilage, and the size of cartilage here is suitable for chin pad surgery. Autologous cartilage has the advantages of being human tissue, high affinity, no rejection and good fixation after transplantation. However, autologous cartilage pad chin also has shortcomings, that is, the shape of chin requires fine symmetry, but cartilage is fragile and difficult to shape; And to take costal cartilage from themselves, some people flinch when they hear it.