17 years ago, I had just moved and had to find a new dentist. I did some online research and found one that checked all the boxes: top-rated, well-established, stellar education, etc. On my first visit, he told me I had a cavity that needed filling. I had never had a single cavity before, so I was skeptical and asked to see it on the x-ray. He pointed to where it supposedly was, but there was no difference between that area and the same area in other teeth. Not wanting to waste my time on an argument, I told him I’d think about it and left. 17 years later, despite never filling this supposed cavity, I’ve had no issues with that tooth and no subsequent dentist has ever said there was a cavity there. Really opened my eyes and made me wonder how many unnecessary cavity fillings are done…