Methods Xenogeneic (porcine) acellular dermal matrix was prepared by removing cellular components with trypsin and triton X100 and was embedded under the skin of SD rat. Gross and histological changes were observed periodically.

• 方法经曲通(Triton)X100、胰蛋白酶处理得到异种(猪)去细胞真皮基质后,将其包埋于SD大鼠皮下,于术后1、2、4、6、8、12、16、20和30周观察异种(猪)去细胞真皮基质的大体形态及组织学变化。