Tough Gel Stretches to 21 Times Its Length, Recoils, and Heals Itself: Biocompatible Material Much Tougher Than Cartilage

 A team at Harvard has discovered a new biocompatible hydrogel created from polyacrylamide and alginate, two common polymers in use today. The two polymers have different bonds (one ionic and one covalent) giving the gel superior properties that greatly exceeds the two independent polymers. The hydrogel can stretch 21 times its length and has supreme elasticity and strength that allows it to return to its form without ripping after being stretched. The hydrogel can also recover very well and maintain its elasticity over multiple stretches and even when damaged by slight tears and holes.These properties may permit it to be used as artificial cartilage to replace damaged cartilage.

This article is of great interest to me because of the vast number of people that it could help if used as a cartilage replacement. Millions of people are affected by cartilage problems. There are over 20 million people in the United States alone who are affected by osteoarthritis, including my mom. Furthermore, many young people, including some of my friends, are also affected by cartilage problems in the form of  meniscus injuries. The idea of being able to replace the cartilage to alleviate pain and discomfort and increase mobility again is very encouraging.

http://www.sciencedaily.com/releases/2012/09/120905134914.htm