Hard to heal
Cartilage, the elastic tissue that forms a smooth shock-absorbing surface for joints, can tear or be worn down over time. The body isn't very good at repairing damaged cartilage on its own, so it needs a helping hand to heal properly.
Existing treatments to repair cartilage, which often involve transplanting cartilage from one bone to another, give inconsistent results and can be painful and expensive.
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Around 400,000 people a year injure their knees, mainly in sports-related accidents.
Image: iStockphoto |
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