RVG Full Form and RVG Dental X-Ray: Radiovisiography Explained

RVG is the name many Indian clinics use for a digital intraoral X-ray. Instead of a film packet, a small sensor connected to a computer sits in your mouth. The X-ray beam strikes it and the image appears on screen almost immediately. Searches for "dental digital X-ray" are usually about the same thing.

The pictures it produces are the same types as film: a periapical for one tooth and its root, or a bitewing for the crowns of the back teeth. RVG is a way of capturing the image, not a different kind of X-ray. See our guide to the types of dental X-ray for the full list.

The practical gains are speed and flexibility. There is no wait for chemicals to develop the film, so the dentist can check the picture while you are in the chair, which matters during a root canal when the length of the canal is being checked. The image can be zoomed, made brighter or darker, and shared with you on screen.

Digital sensors also need less radiation than film to make a usable picture, which is one reason they have largely replaced film. The benefit comes from the sensor, not from the number of X-rays taken, so a dentist should still take only what is needed.

The sensor is a small, flat plate in a protective cover. The dentist places it behind the tooth, or you bite gently on a holder, and the machine is placed outside your cheek. The exposure lasts a moment. The sensor can feel hard against the floor of the mouth or the palate, and if you gag, tell the dentist so they can use a smaller sensor or take the picture in stages.

Check how a bitewing is positioned in our guide to the bitewing X-ray, and see how decay appears on the screen in our guide to a dental cavity on X-ray. If you are pregnant or might be, mention it first. The image is only part of the diagnosis, and findings on it are always checked against an examination.