imran
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« on: June 02, 2014, 02:34:15 AM » |
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Bad or painful knees are one of the most common causes of pain in the elderly, and can start at quite an early age due to extra stress on the cartilage or due to injury. This damage is rarely healed by the body.Part of the reason this damage doesn't heal well is because the cartilage in the knee gets very little blood flow, which body parts need to fix problems on a cellular level. Part of the standard treatment for knee cartilage healing is to make tiny holes in the area and let the blood pour in to encourage a healing process.
There are two problems with this method. The first is that the new tissue rarely replaces all of the damaged tissue, meaning it is never a complete replacement. The second is that the space may fill with scar tissue instead of new cartilage, which isn't really a solution.
But a new method is seeing light recently, as published in the journal of Translational Medicine, scientists, including biomedical engineer Jennifer Elisseeff from Johns Hopkins University. This method proposes the use of a replacement material, a hydrogel with some special properties.
The gel, which looks a lot like jell-o and behaves a lot like it too, is injected into the knee as liquid. However, once it is exposed to UV light, it hardens, providing a sort of scaffold for stem cells to attach to and grow on. The way it is built involves many bindings and criss-crossing fibers, to provide a very strong and stable structure.
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