We talk a lot about the 80-20 rule (the “Pareto principle”) on The Prepared. For example, 20% of the total possible work gets you 80% prepared. To go from 80% to 100% prepared requires a lot more work and money. Another example is that you should prepare for the 80% of likely scenarios, not the unlikely ones like fascist zombies arriving on a radioactive alien asteroid.
Blame modern diets, blame our longevity, or blame the mistakes of mother nature - but the bottom line is that for most humans, dental problems are a question of "when", not "if". And when excruciating pain strikes at an inopportune time, it's really no laughing matter: in absence of adequate medical care, tooth problems have been known to push some people to the verge of suicide.