http://www.washingtontimes.com/news/2018/jul/23/3d-imaging-printing-speed-knee-replacement-recover/

Severe arthritis and 26 years of high-impact activity took its toll on Bowie, Maryland, fitness instructor Howard Harriston, who endured countless painkilling injections and numerous operations to remove damaged cartilage from his left knee.

"I was afraid. ... I thought my career was over," he said.