So why does every company quote studies showing patient dissatisfaction around 20% for knee replacements? They are all chasing that number. Xrays look good, components well positioned, and patients are unhappy? Because nothing in our bodies is symmetric, and the knee is not a simple hinged joint. The arrogance of surgeons to think it’s all about their skill, and that an anatomical knee replacement won’t make a difference is why it is difficult for Conformis to make more of a dent in the market. “Doing great” is because the surgeon doesn’t see them back. It doesn’t mean they are active and living full lives. Maybe their pain is gone, and they are able to “get around” with a 20 year old designed knee, but my grandma’s Cavalier with crank windows can get around. I’d rather drive something up to date and with some creature comforts.