One thing this article misses are medical procedures that improve the quality of life, but have no bearing on life expectancy.<p>For example, if you knock out your front row of teeth, not only do you look weird to people (a pirate), but also you can no longer easily bite into a hamburger, and your speech is impacted. You will have trouble pronouncing words that contain 'v', 'th', or 'f'.<p>Getting implants is not going to increase your life expectancy, unless you live in a society devoid of knives (our external teeth). But the increase in quality of life is often worth it.<p>That being said, in the US dentists seem to take way too many X-rays. They take X-rays before the doctor even sees you. Then the doctor tells you what you could have told them.<p>Source: personal experience.