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www.fdanews.com/articles/100906-getting-hip-to-the-boomers

Getting Hip to the Boomers

November 9, 2007

The hips and knees of 77 million baby boomers are rapidly wearing out, but the people to whom those joints belong aren’t retreating to their beds and sofas. They plan to keep right on skiing, surfing, and running, and they want replacement parts that can keep up with them. That demand has sparked a marketing war among device-makers Stryker, Zimmer and Smith & Nephew, which have introduced all manner of customizable joints, from knees designed for women to hips that are more flexible than the one Grandpa got.
Business Week