I need this, or at least I think I will in about 20 years. I never liked the concept of scraping cartilage out of my knees. Doesn’t that leave me with less cartilage? Scientists are working on a procedure which goes far beyond just scraping the piece out. In fact, this even goes beyond microfacture surgery. This still isn’t true cartilage replacement from what I can tell, but considering that bone marrow can actually contain stem cells, and what microfracture surgery does, it kind of makes sense. Hopefully, they can continue along this line until the gel can contain extra stem cells when injected.