Back in my day, dentists relied on x-ray to detect cavities!
I have my teeth professionally cleaned and examined at least once a year. Twice if my teeth are feeling extra grimy, which is usually every other year.
Three years ago, my old dentist probed my teeth with an “explorer.” This handheld device supposedly beeps every time it detects a cavity and did once for me. My visual and x-ray exams, however, came back negative.
Of course, instead of saying, “Blake, you have a cavity and I recommend filling it,” my dentist told the hygienist in short hand, “O-6” or something of the sort. You know how they do.