I went to the dentist a few weeks ago andhad x-rays taken which all they did was double up on the vests that lays across you. But one thing they did mention is that if you do need any cavities filled or any other work they always like to do it during the 2nd trimester. I would check with your doctor just to be safe
I work for a dental office and have been in 2-3 offices in the last 3-4 yrs. none of the dentist I work for would do any xrays unless there was a problem and we get the ok from the pts OB/GYN. But thats not to say that all dentist are that way, just the ones Ive worked for.