A demonstration of the ultrasonic tweezers (Photo: University of Southampton)
Polystyrene spheres are levitated by the sonotweezers (Photo: Bruce Drinkwater, Bristol University)
Although it's now possible to create lab-grown cartilage, there's still at least one big challenge in doing so – cartilage grown in a flat Petri dish may not be optimally-shaped for replacing the body's own natural cartilage parts. Scientists from a consortium of UK universities, however, are developing a possible solution. They're using "ultrasonic tweezers" to grow cartilage in mid-air.
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