Occlusal Radiograph
An intraoral radiographic projection in which a large film or sensor is placed on the occlusal plane, providing a broad view of the dental arch, hard palate, or floor of the mouth.
Full Definition
Occlusal radiographs are used when a wider field of view than standard periapical films is needed, particularly for localising unerupted teeth, supernumerary teeth, salivary calculi in Wharton's duct, or assessing the extent of jaw fractures. Two principal projections exist: the standard (true) occlusal, producing a cross-sectional view, and the oblique occlusal, producing a lateral view of the arch. Editors must distinguish this term from 'bitewing radiograph,' which also uses the occlusal plane for film placement but serves a different diagnostic purpose (interproximal caries detection). The term 'occlusal' refers to the placement, not to the occlusion of teeth, and should not be confused with 'occlusal analysis' as used in prosthodontics.
Usage
Usage note: Specify the arch (maxillary/mandibular) and projection type (standard/oblique) wherever possible for editorial precision.
In Context
- "An upper standard occlusal radiograph was prescribed to localise the palatally displaced canine and assess its relationship to adjacent tooth roots." — Orthodontic treatment planning report
- "The report incorrectly described a true occlusal radiograph as a 'bitewing film'; these are distinct projections with different diagnostic applications." — Radiology report audit