What kinds of hernia biological patches are there?

Hello, the annual meeting of American Hernia Association divides hernia repair materials into two categories: one is artificial biomaterial patch, which is mainly polymer, and the polymers used are polypropylene, polyester and polytetrafluoroethylene; The other is biological patch, which is based on biological natural materials and approved by the US Food and Drug Administration for clinical use, including human dermis, porcine small intestinal submucosa, porcine dermis, embryonic bovine dermis and so on.