horizontal angulation


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Related to horizontal angulation: vertical angulation

horizontal angulation

Etymology: Gk, horizein, to encircle; L, angularis, angle
the angle within the occlusal plane, relative to a reference in the vertical or sagittal plane, at which the central x-ray beam is directed during radiography or dental imaging of oral structures. Compare vertical angulation.

horizontal angulation

The position of the dental x-ray tube head in the horizontal plane. To avoid errors in x-ray interpretation, the central ray is directed perpendicular to the curve of the dental arch and film. Correct horizontal angulation produces a radiograph with “open” contacts. Incorrect horizontal angulation produces a radiograph with “overlapped” contacts.
See also: angulation
References in periodicals archive ?
It was noted that there were more horizontal angulation and placement errors (79 and 22, respectively) with the film system and more vertical angulation errors (n=91) with the CCD system.
It was noted that there were more horizontal angulation errors with both systems--50 with the film system and 44 using the CCD system.
Of the subjects, 44% felt their most common CCD errors were vertical angulation and receptor placement compared to 59% who expressed horizontal angulation error was the main technique error when using film.
When the data were evaluated by the type of technique error, incorrect vertical angulation and cone centering errors were seen more often with the CCD system while packet placement and horizontal angulation errors were more common in the film-based system.

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