Studies show patients in their 90s do well after getting hip surgery Anyone who has ever noticed the spry seniors stepping alongside them at a 5K run, or keeping up with an aerobics class at the gym, knows that aging has changed dramatically in the past few years. We not only live longer; we stay active and energetic well into our golden years. So the news that hip replacement surgery is safe for patients in their 90s is encouraging. Age can be a significant contributing factor in osteoarthritis, when wear and tear on a joint can lead to severe pain…