In spine surgery, one of the fastest growing medical technology market segments is cervical artificial discs. On a global basis, sales will grow at a double digit annual rate, but the bulk of the growth will ensue from sales of cervical artificial discs in the U.S., which will be gaining approvals over the coming decade that will result in the U.S. gaining an ever greater share of the global market.  Below is the distribution of the cervical artificial disc market by country from 2010 to 2020.

Source:  MedMarket Diligence Report #M520, "Worldwide Spine Surgery: Products, Technologies, Markets and Opportunities, 2010-2020".