For exploration of the tooth and adjacent structures that make up the periodontium Oral radiography is most useful. Simple in its application, with the placement of radiographic plates in the oral cavity, intraoral radiography can be of two types: periapical, ideal for assessing problems in dental support, since it analyzes the piece from the crown to the root and shows the surrounding tissue; or interproximal, returns in a single image up to 4 or 5 dental crowns.