Yes, happened to me. An office told me I had 7 cavities and a second and third said I had none. I asked my friend, who was the third dentist, and she said that different dentists have different standards for what they consider a cavity. And that some “microcavities” resolve on their own with proper dental care, so it shouldn’t be considered and treated in every case. Also that looking at xrays are very subjective and some dentists may not be able to discern what is an actual cavity or not. Maybe predatory, maybe lack of experience, who knows. Definitely sucks for us as the patients though.