To determine the vertical angulation when using the bisecting technique, the central rays of the x-ray beam should be directed
A) perpendicular to the image receptor.
B) parallel to the image receptor.
C) perpendicular to the imaginary bisector.
D) parallel to the imaginary bisector.
C
Explanation: A) To cast an accurate shadow representation of a tooth onto the image receptor, the angle formed by the long axis of the tooth and the plane of the image receptor must be bisected. The central ray of the x-ray beam is directed perpendicular to this imaginary bisector.
B) To cast an accurate shadow representation of a tooth onto the image receptor, the angle formed by the long axis of the tooth and the plane of the image receptor must be bisected. The central ray of the x-ray beam is directed perpendicular to this imaginary bisector.
C) To cast an accurate shadow representation of a tooth onto the image receptor, the angle formed by the long axis of the tooth and the plane of the image receptor must be bisected. The central ray of the x-ray beam is directed perpendicular to this imaginary bisector.
D) To cast an accurate shadow representation of a tooth onto the image receptor, the angle formed by the long axis of the tooth and the plane of the image receptor must be bisected. The central ray of the x-ray beam is directed perpendicular to this imaginary bisector.
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