Complaints on Hip Replacements Soar

I'm sure you're like- why do I care about hip replacement problems? Well, for those that don't know my extensive personal history, my dad has had two hip replacement surgeries. To make a long story short: back in my elementary school days, my dad was a truck driver. While driving, he came over a hill and discovered backed up traffic for construction past the proper signage. He chose to drive off the road and put himself in the ditch (and grave danger) instead of hitting another car and possibly hurting another person. So multiple injuries (to put it lightly). He had emergency surgeries, including hip replacement. That was over 15 years ago so it was a fully metal hip replacement.
This article talks about rising complaints from patients (thankfully for my dad, most hip replacements last about 15 years, as his did). This quote is kind of upseting- "Under FDA rules, many all metal devices were sold without testing in patients or without a requirement that producers track their performance." Why would that seem like a good idea to anyone?
My dad has since had another hip replacement almost 2 years ago, and because of technological advances in prosthetic body parts- it has no metal. But the last few years he had a metal hip he was in excrutiating pain most of the time. It wasn't until the next replacement that we found out it was because the metal prosthesis had been rubbing away his bone. Ouch.
So I read about all these complaints, and what really makes me feel dismayed is that there are many people who suffer through this pain, who deal with the malfunctioning prostheses because their health insurance can't/won't help them. Thankfully my dad has the VA as an advocate and doesn't have to worry much about premuims and deductibles and all that fun stuff. All I can do is hope is that something is done for these people- though it is probably unlikely to happen.