As Healthcare Finance News mentions in this interview with them, orthopedic device makers are eschewing the competitive and lower margin hip and knee implant market and focusing on biomaterials as a growth area. It is not without its problems, such as the Stryker and Medtronic BMP cases, but these companies have found the supplemental growth useful.
http://www.healthcarefinancenews.com/news/kalorama-big-growth-predicted-biomaterials-market
http://www.healthcarefinancenews.com/news/kalorama-big-growth-predicted-biomaterials-market