If memory serves me, it was the Stryker hip replacement brand that was under fire and recalled recently. I don't recall the details, I want to think it had to do with causing infections some how, but I may be off base with that.
A friend of mine has had hip replacement and the first one has recently been replaced (they are good for about 10 years, I think). When they did the second one, I think they added cadaver bone to add about 2" of length to her. She doesn't limp like she used to and rides her horses daily.
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My opinion only. Not legal advice.
Say you'll haunt me - Stone Sour