Glossary

Author: Glossary

  • Vertical 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…

  • 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.  

  • Angor animi

    The feeling that one is dying, as may occur in connection with angina pectoris.  

  • Angor

    Violent distress, as in angina pectoris.  

  • Angle’s classification

    Classification of malocclusion.  

  • Venous angle

    The angle formed by the junction of the internal jugular and subclavian veins.  

  • Angle of treitz

    Sharp curve at the duodenojejunal junction.  

  • Sphenoid angle

    The angle formed at the top of the sella turcica by the intersection of lines drawn from the nasal point and the tip of the rostrum of the sphenoid.  

  • Sacrovertebral angle

    The angle formed by the base of the sacrum and the fifth lumbar vertebra.  

  • Sacrolumbar angle

    The angle formed by articulation of the last lumbar vertebra and the sacrum.