These are made with the help of a film or a digital sensor and are divided into 2 groups:
Intraoral radiographs are the most common:
the film or sensor is placed just behind the crowns of the molars and premolars. This x-ray allows the detection of interdental cavities (caries) and allows an evaluation of the bone structure close to the crowns.
the film or sensor is placed along the axis of the teeth next to the tongue or palate. This x-ray allows the detection of bone lesions (cysts or apical lesions).
Extra oral radiographs:
gives an overall view of the teeth and supporting bone. It is less precise than the intraoral radiographs, particularly for detecting caries.
this x-ray is an essential part of an orthodontic documentation; its analysis determines the horizontal and vertical position of the maxillae, and the axis of the incisors. It also allows a follow-up of the patients growth pattern and coarse of treatment.
Cone beam CT
this is the most precise but also the exam that emits the most radiation, although less than a medical scanner. It is performed if a three-dimensional vision is necessary, usually in surgery or implantology.
A specialist in dentofacial imaging makes the realization and interpretation of this image in a radiological institution.