I think there is a chart on the internet someplace which will give you an idea of xray radiation compared to other things (such as taking a plane trip)
Dental Imagery Radiation Facts | Seymour Dental - Dedicated personal care
But xrays are by far the least amount of radiation. I had to have 2 or 3 every three months when I was a kid. For scoilosis.
I am still here.