I have been cut (by accident) with a razorblade, i have been hit by a car and scraped skin off my body, i have broken bones in my body, but no pain was worse than the tooth ache i had as a result of being depressed earlier in life.
Before that time, i couldn't name a single painkiller... when it was at it worst, i ate Ibuprofen like Dr House ate Vicodin...
Lesson learned: Even if you get depressed and loose the will to live at a point in life, take care of your teeth, your life may turn for the better. And going to the dentist after something like that is bloody expensive, once you are in that situation, going to the dentist is NOT optional.
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"It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring" (Carl Sagan)