A bite-wing is a single X-ray that shows upper and lower teeth (from crown to about the level of the supporting bone) in a select area on the same film to check for decay in between teeth. They are commonly used to plan extractions or braces, and deliver three to four times the radiation exposure that four bitewings do. Periapical X-rays, which capture images of two or three teeth at a time, down to the root. You may recognize them as bitewings because you “bite” on a cardboard tab to hold them in place. Bitewing x-rays show the crowns of your molar and premolar teeth, and the height of the bone between your teeth, aiding in the diagnosis of cavities and periodontal disease

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