Bionic prostheses are making possible previously unimaginable progress in helping the physically impaired regain much of what they've lost. Impressive advances in the field are reported often, but the devices seldom make it to market, writes Jamie Hartford. "For every 10 of these great new progresses, maybe one actually becomes commercially available," says Georgia Institute of Technology's Maysam Ghovanloo. Many of the devices encountering a lack of venture capital that could bring them to commercial fruition, Hartford contends.

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