Yeah, I would buy that. I’ve never been told that explicitly by my dentist, but I had to get four cavities filled at once on my back few teeth, on the side that faces outward, which is, according to the dentist, A SUPER WEIRD place to get cavities. He told me unless I was drinking with a straw and putting it directly on my teeth every day, there wasn’t much I could do about it. 
I haven’t been to the dentist in … years, and I’m really nervous about going back in case I’ve got 96 cavities and they just try to sell me a whole new mouth.