Occlusal radiography is defined as those intraoral radiographic techniques taken using a dental X-ray set where the image receptor (film packet or digital phosphor plate – 5.7 × 7.6 cm) is placed in the occlusal plane. Suitable sized solid-state digital sensors are not currently available.
The terminology used in occlusal radiography is very confusing. The British Standards Glossary of Dental Terms (BS 4492: 1983) is inadequate in defining the various occlusal projections and in differentiating between them. The result is that there is still little uniformity in terminology among different publications and teaching institutions.
2. The image receptor, suitably barrier wrapped, is placed flat into the mouth on to the occlusal surfaces of the lower teeth. The patient is asked to bite together gently. The image receptor is placed centrally in the mouth with its long axis crossways in adults and anteroposteriorly in children.
Fig. 9.1 A Diagram showing the position of the image receptor in relation to the lower arch. B Positioning from the front; note the use of the protective thyroid shield. C Positioning from the side. D Diagram showing the positioning from the side. The resultant radiograph is shown in Fig. 9.2.