Reconstruction of auricular framework using autologous perichondrial grafts. An experimental study]

An experimental study was performed in 13 adult dogs to find out whether the cartilage forming capacity of the costal perichondrium could be utilized in reconstruction of the auricular framework. Silastic ear-shaped frameworks, which were wrapped by free costal perichondrial grafts, were transferred to the subcutaneous space on both side of the thorax. The animals were sacrificed at 2 months, 3 months, and 4 months postoperatively. After 6 weeks, the reconstructed auricular cartilage framework collapsed and the silicone framework was rejected. In groups of 2, 3 and 4 months, collapse of the cartilage framework occurred when the silicone tube was removed in 7 day. There was certain elasticity, but the auricular framework had only little resistance to pressure. How to improve new cartilage production would be the key point of further study. Histologically, it was shown that mature hyalin cartilage was generated in 2 months postoperatively.