Modern dentistry offers lots of advantages, and one of them is digital x-ray Digital X-rays need one third of the radiations of the regular x-ray. Which means lees exposure to X-rays. And x-ray image is available on the computer monitor in seconds. It does not need the regular film processing either which helps with avoiding environment polluting chemicals. Picture on the right hand side shows a typical digital sensor. It size and shape is almost like the regular X-ray film.