Tooth decay can be sneaky – it doesn’t tend to show signs of its presence early on. X-rays are an important diagnostic tool that allows your dentist to confirm if you have tooth decay, or if you have any problems such as infection around the roots of the tooth, or bone loss. Spotting it early means your dentist can deal with the problem before it becomes significant.
Regardless of whether you’re a child or an adult, you can have X-rays safely taken of the inside and outside of your mouth. The amount of radiation involved is extremely low, and is equivalent to the sort of exposure you’d receive on a 1-2 hour flight. This means that even if you’re pregnant you can have X-rays taken, although they are generally kept to a minimum during this period.
Oh, and that thing about your dentist leaving the room while the X-rays are taken? Nothing to worry about there – they’re taking lots of X-rays all day long and stepping out of the room limits their ongoing exposure to radiation.