Also found in: Dictionary, Thesaurus, Financial, Encyclopedia.
Related to vertical angulation: horizontal angulation
Etymology: L, vertex + angulus, corner
the angle within the vertical plane, relative to a reference in the horizontal or occlusal plane, at which the central x-ray beam is directed during radiography or dental imaging of oral structures. Compare horizontal angulation.
The position of the dental x-ray tube head in the vertical plane, measured in degrees. The central ray is directed perpendicular to the film and the tooth when using the paralleling imaging technique. When using the bisecting angle technique, the central ray is directed perpendicular to the bisector. Errors in calculating the vertical angulation produce elongated or foreshortened images.
See also: angulation