Glue ear, a condition caused by sticky fluid in the middle part of the ear, can burst the eardrum in severe cases, and tissue taken from pig intestines could be used to patch up the hole
Source:
https://www.newscientist.com/article/2251378-eardrum-implants-made-from-pig-guts-could-fix-chronic-glue-ear/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home