Disclosed is a cell-penetrable medical material in which cells can invade, comprising denatured collagen with helix content of 0 to 80%, and carrier substance having higher resistance to enzyme decomposition than the denatured collagen. An artificial skin in which this medical material is used as the...http://www.google.de/patents/US5263983?utm_source=gb-gplus-sharePatent US5263983 - Medical material and prosthetic skin in which cells can invade
