I will start off by this. When I was growing up I had great teeth. After 3 incidents at a horrible dentist office I never wanted to go back growing up. The last incident I had was when I was 15, the dentist is no longer in practice after it was reported.  
I always brushed my teeth and tried to take care of them the best I could. 
Fast forward to my early 20's.  I started working shift work...