After years of robust financial health, artificial knee- and hip-joint maker Stryker ( SYK) has suffered aches and pains the last couple years.

FORBES: Artifical Knee- And Hip-Joint Maker Stryker Can Stand Tall Again

Last year, British experts at the world's biggest artificial joint registry said doctors should stop using metal-on-metal hip replacements after a study found that, after five years, about 6 percent of people who had used them needed surgery to fix or replace them.

NPR: Trial Under Way In LA Hip Joint Replacement Suit