White teeth have at least some roots in biology - generally the younger you are, the whiter your teeth - still it makes no sense to compare the whiteness of different aged people and judge their health based on them.
Ethically we are on a dangerous path: Orthodontics for children are standard in Europe and the US, countries like Japan are catching up quickly. Teeth-whitening is common in the US and is becoming more popular in Europe, too. Orthodontics includes oral surgery more and more often. Korea is all in and full blown plastic surgeries are becoming the standard [0].
These surgeries cause pain and hinder you to eat properly for months. Still we are on a path to include them in our definition of health. In Korea parents often pay for them as a present for graduation.
People who the majority perceives as disabled or even just ugly are not necessarily unhealthy. We should make a clear distinction between body modifications and medicine. Unfortunately our ape brains see a high status individual and cluster these things together. This lets us worry about health problems we previously did not even know we had, making us psychologically and often physically unhealthier in the end.
Another big problem is, that we ignore the fact that we age. I do not think that care for the elderly should be an area of medicine. When your body breaks apart at 80 years old, that does not make you unhealthy, you are just old. You should not get the needed social interaction from doctors, who try to fix something that is perfectly natural to fall apart.
Some of the plethora of pills an 80 year old takes surely increase his or her life expectancy, I feel like others might not be worth the hassle. I surely do not want to ruin my last moments on earth organizing my calendar of doctor appointments trying to squeeze out the last couple of days I can possibly get.
[0]: http://www.newyorker.com/magazine/2015/03/23/about-face