I can still remember a time when I wouldn't have wished it on her, but you're right the irony is more delicious than 6 giant Reece's cups. No matter how good your dental hygiene most people have dealt with a toothache at some point or maybe don't have good enamel so they're prone to cavities. For most folks, it's a pretty easy trip to the dentist to get it handled. Money is generally the thing that keeps folks from going at least here in the states because most employers don't provide actual dental insurance. It's usually some sort of co-operative or plan where the dentist agrees to only charge so much, but there are plenty of things that simply aren't covered at all, same with vision. Her problem isn't financial to hear her tell it. Her problem is finding a dentist with a table made for zoo animals.
I'm sure her molars are rotten considering all of the care and attention she puts into the rest of her hygiene. Not going to the dentist for over a decade isn't ever going to be a good thing regardless of how many times you brush and floss and we know bitch ain't doing any bit of that. She also used to snarf down that Sprite Zero which is loaded with citric acid, not great for any enamel never mind weak enamel. Then just the sheer volume of sugar she would eat. Yep, her teeth are fucked, it's all her fault, and if this is the one thing that gets through her poop bun that she's really fucked up, so be it.