The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) and the Australian Dental Association (ADA) have joined together to produce a factsheet for patients to explain different types of dental imaging and the associated levels of radiation exposure, it also provides an infographic comparing the radiation exposure from dental X-rays to other sources of exposure in everyday (Australian!) life.
https://www.arpansa.gov.au/news/new-radiation-resource-dental-patients
A UK patient information leaflet can be found here, published by the Clinical Imaging Board:
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