Are chest x rays contraindicated in pregnancy?

Could an X-Ray at the dentist's office damage an unborn fetus? Tooth x-ray, also known as dental radiography, is using low energy radiation. If what you mean by tooth x-ray is orthopantomography (OPG), the dose is slightly higher. There are risks of unwanted effects to your baby especially during the first trimester. Unless the x-ray is emergency, I recommend you to postpone.
Be sure to tell your dentist first hand that you are pregnant. Most dentist offices make you put on a lead cover anyhow. I have my tubes tied and they still do it to prevent other radiation effects. They say that any x-ray can be harmful and cause birth defects.