Researchers report on a revolutionary new procedure that uses 3-D printing and the body's stem cells to regenerate knee meniscus, a tissue lining that acts as a natural cushion between the femur and tibia. The procedure, published online Dec. 10 in the journal Science Translational Medicine, has proved successful in sheep at Cornell University six months after surgery, though the researchers will monitor the sheep for a year to ensure the animals do not develop arthritis.
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